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Finding the Fourth Proportional to 425,280.78, 638,045.71 and 125,769.11

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Solution

The fourth proportional to 425,280.78, 638,045.71 and 125,769.11 is: 188,690.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,280.78 : 638,045.71 = 125,769.11 : x
  2. Step 2: Convert to fraction form
    425,280.78/638,045.71 = 125,769.11/x
  3. Step 3: Cross multiply
    425,280.78x = 638,045.71 × 125,769.11
  4. Step 4: Simplify right side
    425,280.78x = 80,246,437,581.37
  5. Step 5: Solve for x
    x = 80,246,437,581.37/425,280.78
  6. Step 6: Final answer
    x = 188,690.49

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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.