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Finding the Fourth Proportional to 642,500.30, 963,750.45 and 455,876.30

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Solution

The fourth proportional to 642,500.30, 963,750.45 and 455,876.30 is: 683,814.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,500.30 : 963,750.45 = 455,876.30 : x
  2. Step 2: Convert to fraction form
    642,500.30/963,750.45 = 455,876.30/x
  3. Step 3: Cross multiply
    642,500.30x = 963,750.45 × 455,876.30
  4. Step 4: Simplify right side
    642,500.30x = 439,350,989,269.34
  5. Step 5: Solve for x
    x = 439,350,989,269.34/642,500.30
  6. Step 6: Final answer
    x = 683,814.45

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Double scale
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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.