Home / 486,939.20-731,637.60-309,531.20

Finding the Fourth Proportional to 486,939.20, 731,637.60 and 309,531.20

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Solution

The fourth proportional to 486,939.20, 731,637.60 and 309,531.20 is: 465,077.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,939.20 : 731,637.60 = 309,531.20 : x
  2. Step 2: Convert to fraction form
    486,939.20/731,637.60 = 309,531.20/x
  3. Step 3: Cross multiply
    486,939.20x = 731,637.60 × 309,531.20
  4. Step 4: Simplify right side
    486,939.20x = 226,464,664,293.12
  5. Step 5: Solve for x
    x = 226,464,664,293.12/486,939.20
  6. Step 6: Final answer
    x = 465,077.91

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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.