Home / 651,434.60-977,151.90-438,858.20

Finding the Fourth Proportional to 651,434.60, 977,151.90 and 438,858.20

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Solution

The fourth proportional to 651,434.60, 977,151.90 and 438,858.20 is: 658,287.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,434.60 : 977,151.90 = 438,858.20 : x
  2. Step 2: Convert to fraction form
    651,434.60/977,151.90 = 438,858.20/x
  3. Step 3: Cross multiply
    651,434.60x = 977,151.90 × 438,858.20
  4. Step 4: Simplify right side
    651,434.60x = 428,831,123,960.58
  5. Step 5: Solve for x
    x = 428,831,123,960.58/651,434.60
  6. Step 6: Final answer
    x = 658,287.30

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Half scale
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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.