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Finding the Fourth Proportional to 425,701.92, 638,618.46 and 145,153.56

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Solution

The fourth proportional to 425,701.92, 638,618.46 and 145,153.56 is: 217,752.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,701.92 : 638,618.46 = 145,153.56 : x
  2. Step 2: Convert to fraction form
    425,701.92/638,618.46 = 145,153.56/x
  3. Step 3: Cross multiply
    425,701.92x = 638,618.46 × 145,153.56
  4. Step 4: Simplify right side
    425,701.92x = 92,697,742,950.72
  5. Step 5: Solve for x
    x = 92,697,742,950.72/425,701.92
  6. Step 6: Final answer
    x = 217,752.70

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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.