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Finding the Fourth Proportional to 425,416.80, 638,125.20 and 172,818.30

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Solution

The fourth proportional to 425,416.80, 638,125.20 and 172,818.30 is: 259,227.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,416.80 : 638,125.20 = 172,818.30 : x
  2. Step 2: Convert to fraction form
    425,416.80/638,125.20 = 172,818.30/x
  3. Step 3: Cross multiply
    425,416.80x = 638,125.20 × 172,818.30
  4. Step 4: Simplify right side
    425,416.80x = 110,279,712,251.16
  5. Step 5: Solve for x
    x = 110,279,712,251.16/425,416.80
  6. Step 6: Final answer
    x = 259,227.45

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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.