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Finding the Fourth Proportional to 663,087.75, 915,061.10 and 361,281.75

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Solution

The fourth proportional to 663,087.75, 915,061.10 and 361,281.75 is: 498,568.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,087.75 : 915,061.10 = 361,281.75 : x
  2. Step 2: Convert to fraction form
    663,087.75/915,061.10 = 361,281.75/x
  3. Step 3: Cross multiply
    663,087.75x = 915,061.10 × 361,281.75
  4. Step 4: Simplify right side
    663,087.75x = 330,594,873,758.52
  5. Step 5: Solve for x
    x = 330,594,873,758.52/663,087.75
  6. Step 6: Final answer
    x = 498,568.82

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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.