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Finding the Fourth Proportional to 425,920.36, 638,838.02 and 173,215.76

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Solution

The fourth proportional to 425,920.36, 638,838.02 and 173,215.76 is: 259,806.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,920.36 : 638,838.02 = 173,215.76 : x
  2. Step 2: Convert to fraction form
    425,920.36/638,838.02 = 173,215.76/x
  3. Step 3: Cross multiply
    425,920.36x = 638,838.02 × 173,215.76
  4. Step 4: Simplify right side
    425,920.36x = 110,656,813,151.20
  5. Step 5: Solve for x
    x = 110,656,813,151.20/425,920.36
  6. Step 6: Final answer
    x = 259,806.35

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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.