Home / 487,945.80-731,918.70-338,646.60

Finding the Fourth Proportional to 487,945.80, 731,918.70 and 338,646.60

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Solution

The fourth proportional to 487,945.80, 731,918.70 and 338,646.60 is: 507,969.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,945.80 : 731,918.70 = 338,646.60 : x
  2. Step 2: Convert to fraction form
    487,945.80/731,918.70 = 338,646.60/x
  3. Step 3: Cross multiply
    487,945.80x = 731,918.70 × 338,646.60
  4. Step 4: Simplify right side
    487,945.80x = 247,861,779,231.42
  5. Step 5: Solve for x
    x = 247,861,779,231.42/487,945.80
  6. Step 6: Final answer
    x = 507,969.90

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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.