Home / 661,531.32-991,044.87-390,849.96

Finding the Fourth Proportional to 661,531.32, 991,044.87 and 390,849.96

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Solution

The fourth proportional to 661,531.32, 991,044.87 and 390,849.96 is: 585,535.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,531.32 : 991,044.87 = 390,849.96 : x
  2. Step 2: Convert to fraction form
    661,531.32/991,044.87 = 390,849.96/x
  3. Step 3: Cross multiply
    661,531.32x = 991,044.87 × 390,849.96
  4. Step 4: Simplify right side
    661,531.32x = 387,349,847,797.71
  5. Step 5: Solve for x
    x = 387,349,847,797.71/661,531.32
  6. Step 6: Final answer
    x = 585,535.16

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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.