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Finding the Fourth Proportional to 499,585.13, 689,385.80 and 281,781.80

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Solution

The fourth proportional to 499,585.13, 689,385.80 and 281,781.80 is: 388,835.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,585.13 : 689,385.80 = 281,781.80 : x
  2. Step 2: Convert to fraction form
    499,585.13/689,385.80 = 281,781.80/x
  3. Step 3: Cross multiply
    499,585.13x = 689,385.80 × 281,781.80
  4. Step 4: Simplify right side
    499,585.13x = 194,256,371,618.44
  5. Step 5: Solve for x
    x = 194,256,371,618.44/499,585.13
  6. Step 6: Final answer
    x = 388,835.38

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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.