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Finding the Fourth Proportional to 425,545.86, 638,340.66 and 110,005.50

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Solution

The fourth proportional to 425,545.86, 638,340.66 and 110,005.50 is: 165,013.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,545.86 : 638,340.66 = 110,005.50 : x
  2. Step 2: Convert to fraction form
    425,545.86/638,340.66 = 110,005.50/x
  3. Step 3: Cross multiply
    425,545.86x = 638,340.66 × 110,005.50
  4. Step 4: Simplify right side
    425,545.86x = 70,220,983,473.63
  5. Step 5: Solve for x
    x = 70,220,983,473.63/425,545.86
  6. Step 6: Final answer
    x = 165,013.90

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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.