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Finding the Fourth Proportional to 425,634.50, 638,312.83 and 141,248.66

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Solution

The fourth proportional to 425,634.50, 638,312.83 and 141,248.66 is: 211,826.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,634.50 : 638,312.83 = 141,248.66 : x
  2. Step 2: Convert to fraction form
    425,634.50/638,312.83 = 141,248.66/x
  3. Step 3: Cross multiply
    425,634.50x = 638,312.83 × 141,248.66
  4. Step 4: Simplify right side
    425,634.50x = 90,160,828,353.62
  5. Step 5: Solve for x
    x = 90,160,828,353.62/425,634.50
  6. Step 6: Final answer
    x = 211,826.88

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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.