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Finding the Fourth Proportional to 425,508.01, 638,356.64 and 185,660.78

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Solution

The fourth proportional to 425,508.01, 638,356.64 and 185,660.78 is: 278,532.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,508.01 : 638,356.64 = 185,660.78 : x
  2. Step 2: Convert to fraction form
    425,508.01/638,356.64 = 185,660.78/x
  3. Step 3: Cross multiply
    425,508.01x = 638,356.64 × 185,660.78
  4. Step 4: Simplify right side
    425,508.01x = 118,517,787,580.49
  5. Step 5: Solve for x
    x = 118,517,787,580.49/425,508.01
  6. Step 6: Final answer
    x = 278,532.45

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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.