Home / 687,786.59-1,031,532.17-431,495.71

Finding the Fourth Proportional to 687,786.59, 1,031,532.17 and 431,495.71

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Solution

The fourth proportional to 687,786.59, 1,031,532.17 and 431,495.71 is: 647,150.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,786.59 : 1,031,532.17 = 431,495.71 : x
  2. Step 2: Convert to fraction form
    687,786.59/1,031,532.17 = 431,495.71/x
  3. Step 3: Cross multiply
    687,786.59x = 1,031,532.17 × 431,495.71
  4. Step 4: Simplify right side
    687,786.59x = 445,101,701,345.68
  5. Step 5: Solve for x
    x = 445,101,701,345.68/687,786.59
  6. Step 6: Final answer
    x = 647,150.88

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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.