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Finding the Fourth Proportional to 663,247.74, 915,281.91 and 361,441.50

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Solution

The fourth proportional to 663,247.74, 915,281.91 and 361,441.50 is: 498,789.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,247.74 : 915,281.91 = 361,441.50 : x
  2. Step 2: Convert to fraction form
    663,247.74/915,281.91 = 361,441.50/x
  3. Step 3: Cross multiply
    663,247.74x = 915,281.91 × 361,441.50
  4. Step 4: Simplify right side
    663,247.74x = 330,820,866,473.27
  5. Step 5: Solve for x
    x = 330,820,866,473.27/663,247.74
  6. Step 6: Final answer
    x = 498,789.29

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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.