Home / 715,147.97-986,900.49-388,458.36

Finding the Fourth Proportional to 715,147.97, 986,900.49 and 388,458.36

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Solution

The fourth proportional to 715,147.97, 986,900.49 and 388,458.36 is: 536,070.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,147.97 : 986,900.49 = 388,458.36 : x
  2. Step 2: Convert to fraction form
    715,147.97/986,900.49 = 388,458.36/x
  3. Step 3: Cross multiply
    715,147.97x = 986,900.49 × 388,458.36
  4. Step 4: Simplify right side
    715,147.97x = 383,369,744,691.75
  5. Step 5: Solve for x
    x = 383,369,744,691.75/715,147.97
  6. Step 6: Final answer
    x = 536,070.52

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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.