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Finding the Fourth Proportional to 715,244, 987,054.10 and 392,974.96

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Solution

The fourth proportional to 715,244, 987,054.10 and 392,974.96 is: 542,314.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,244 : 987,054.10 = 392,974.96 : x
  2. Step 2: Convert to fraction form
    715,244/987,054.10 = 392,974.96/x
  3. Step 3: Cross multiply
    715,244x = 987,054.10 × 392,974.96
  4. Step 4: Simplify right side
    715,244x = 387,887,545,465.34
  5. Step 5: Solve for x
    x = 387,887,545,465.34/715,244
  6. Step 6: Final answer
    x = 542,314.99

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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.