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Finding the Fourth Proportional to 261,159.53, 391,739.42 and 172,392.29

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Solution

The fourth proportional to 261,159.53, 391,739.42 and 172,392.29 is: 258,588.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,159.53 : 391,739.42 = 172,392.29 : x
  2. Step 2: Convert to fraction form
    261,159.53/391,739.42 = 172,392.29/x
  3. Step 3: Cross multiply
    261,159.53x = 391,739.42 × 172,392.29
  4. Step 4: Simplify right side
    261,159.53x = 67,532,852,876.41
  5. Step 5: Solve for x
    x = 67,532,852,876.41/261,159.53
  6. Step 6: Final answer
    x = 258,588.51

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1.5x scale

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.