Home / 717,426.29-990,028.01-390,731.90

Finding the Fourth Proportional to 717,426.29, 990,028.01 and 390,731.90

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Solution

The fourth proportional to 717,426.29, 990,028.01 and 390,731.90 is: 539,198.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,426.29 : 990,028.01 = 390,731.90 : x
  2. Step 2: Convert to fraction form
    717,426.29/990,028.01 = 390,731.90/x
  3. Step 3: Cross multiply
    717,426.29x = 990,028.01 × 390,731.90
  4. Step 4: Simplify right side
    717,426.29x = 386,835,518,496.72
  5. Step 5: Solve for x
    x = 386,835,518,496.72/717,426.29
  6. Step 6: Final answer
    x = 539,198.98

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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.