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Finding the Fourth Proportional to 257,801.72, 386,552.70 and 172,510.04

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Solution

The fourth proportional to 257,801.72, 386,552.70 and 172,510.04 is: 258,664.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,801.72 : 386,552.70 = 172,510.04 : x
  2. Step 2: Convert to fraction form
    257,801.72/386,552.70 = 172,510.04/x
  3. Step 3: Cross multiply
    257,801.72x = 386,552.70 × 172,510.04
  4. Step 4: Simplify right side
    257,801.72x = 66,684,222,705.49
  5. Step 5: Solve for x
    x = 66,684,222,705.49/257,801.72
  6. Step 6: Final answer
    x = 258,664.78

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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.