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Finding the Fourth Proportional to 651,492.70, 977,239.05 and 438,916.30

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Solution

The fourth proportional to 651,492.70, 977,239.05 and 438,916.30 is: 658,374.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,492.70 : 977,239.05 = 438,916.30 : x
  2. Step 2: Convert to fraction form
    651,492.70/977,239.05 = 438,916.30/x
  3. Step 3: Cross multiply
    651,492.70x = 977,239.05 × 438,916.30
  4. Step 4: Simplify right side
    651,492.70x = 428,926,148,041.52
  5. Step 5: Solve for x
    x = 428,926,148,041.52/651,492.70
  6. Step 6: Final answer
    x = 658,374.45

Related Problems

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Half scale
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Double scale
Find fourth proportional to 651,493.70, 977,240.55 and 438,917.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.