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Finding the Fourth Proportional to 662,704.11, 914,488.17 and 390,758.85

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Solution

The fourth proportional to 662,704.11, 914,488.17 and 390,758.85 is: 539,221.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,704.11 : 914,488.17 = 390,758.85 : x
  2. Step 2: Convert to fraction form
    662,704.11/914,488.17 = 390,758.85/x
  3. Step 3: Cross multiply
    662,704.11x = 914,488.17 × 390,758.85
  4. Step 4: Simplify right side
    662,704.11x = 357,344,345,647.81
  5. Step 5: Solve for x
    x = 357,344,345,647.81/662,704.11
  6. Step 6: Final answer
    x = 539,221.56

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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.