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Finding the Fourth Proportional to 715,222.74, 987,024.78 and 392,953.71

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Solution

The fourth proportional to 715,222.74, 987,024.78 and 392,953.71 is: 542,285.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,222.74 : 987,024.78 = 392,953.71 : x
  2. Step 2: Convert to fraction form
    715,222.74/987,024.78 = 392,953.71/x
  3. Step 3: Cross multiply
    715,222.74x = 987,024.78 × 392,953.71
  4. Step 4: Simplify right side
    715,222.74x = 387,855,049,162.93
  5. Step 5: Solve for x
    x = 387,855,049,162.93/715,222.74
  6. Step 6: Final answer
    x = 542,285.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.