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Finding the Fourth Proportional to 261,021.70, 391,532.55 and 176,822.20

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Solution

The fourth proportional to 261,021.70, 391,532.55 and 176,822.20 is: 265,233.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,021.70 : 391,532.55 = 176,822.20 : x
  2. Step 2: Convert to fraction form
    261,021.70/391,532.55 = 176,822.20/x
  3. Step 3: Cross multiply
    261,021.70x = 391,532.55 × 176,822.20
  4. Step 4: Simplify right side
    261,021.70x = 69,231,646,862.61
  5. Step 5: Solve for x
    x = 69,231,646,862.61/261,021.70
  6. Step 6: Final answer
    x = 265,233.30

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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.