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Finding the Fourth Proportional to 663,702.80, 915,909.72 and 361,896.80

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Solution

The fourth proportional to 663,702.80, 915,909.72 and 361,896.80 is: 499,417.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,702.80 : 915,909.72 = 361,896.80 : x
  2. Step 2: Convert to fraction form
    663,702.80/915,909.72 = 361,896.80/x
  3. Step 3: Cross multiply
    663,702.80x = 915,909.72 × 361,896.80
  4. Step 4: Simplify right side
    663,702.80x = 331,464,796,756.90
  5. Step 5: Solve for x
    x = 331,464,796,756.90/663,702.80
  6. Step 6: Final answer
    x = 499,417.51

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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.