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Finding the Fourth Proportional to 279,397.65, 419,197.86 and 172,657.20

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Solution

The fourth proportional to 279,397.65, 419,197.86 and 172,657.20 is: 259,048.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,397.65 : 419,197.86 = 172,657.20 : x
  2. Step 2: Convert to fraction form
    279,397.65/419,197.86 = 172,657.20/x
  3. Step 3: Cross multiply
    279,397.65x = 419,197.86 × 172,657.20
  4. Step 4: Simplify right side
    279,397.65x = 72,377,528,753.59
  5. Step 5: Solve for x
    x = 72,377,528,753.59/279,397.65
  6. Step 6: Final answer
    x = 259,048.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.