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Finding the Fourth Proportional to 715,014.54, 986,728.14 and 392,732.16

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Solution

The fourth proportional to 715,014.54, 986,728.14 and 392,732.16 is: 541,974.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,014.54 : 986,728.14 = 392,732.16 : x
  2. Step 2: Convert to fraction form
    715,014.54/986,728.14 = 392,732.16/x
  3. Step 3: Cross multiply
    715,014.54x = 986,728.14 × 392,732.16
  4. Step 4: Simplify right side
    715,014.54x = 387,519,873,754.98
  5. Step 5: Solve for x
    x = 387,519,873,754.98/715,014.54
  6. Step 6: Final answer
    x = 541,974.82

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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.