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Finding the Fourth Proportional to 715,959.27, 988,027.47 and 393,690.15

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Solution

The fourth proportional to 715,959.27, 988,027.47 and 393,690.15 is: 543,294.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,959.27 : 988,027.47 = 393,690.15 : x
  2. Step 2: Convert to fraction form
    715,959.27/988,027.47 = 393,690.15/x
  3. Step 3: Cross multiply
    715,959.27x = 988,027.47 × 393,690.15
  4. Step 4: Simplify right side
    715,959.27x = 388,976,682,868.42
  5. Step 5: Solve for x
    x = 388,976,682,868.42/715,959.27
  6. Step 6: Final answer
    x = 543,294.43

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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.