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Finding the Fourth Proportional to 425,634.40, 638,312.68 and 141,248.56

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Solution

The fourth proportional to 425,634.40, 638,312.68 and 141,248.56 is: 211,826.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,634.40 : 638,312.68 = 141,248.56 : x
  2. Step 2: Convert to fraction form
    425,634.40/638,312.68 = 141,248.56/x
  3. Step 3: Cross multiply
    425,634.40x = 638,312.68 × 141,248.56
  4. Step 4: Simplify right side
    425,634.40x = 90,160,746,879.74
  5. Step 5: Solve for x
    x = 90,160,746,879.74/425,634.40
  6. Step 6: Final answer
    x = 211,826.74

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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.