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Finding the Fourth Proportional to 453,900.78, 680,960.52 and 138,338.28

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Solution

The fourth proportional to 453,900.78, 680,960.52 and 138,338.28 is: 207,540.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,900.78 : 680,960.52 = 138,338.28 : x
  2. Step 2: Convert to fraction form
    453,900.78/680,960.52 = 138,338.28/x
  3. Step 3: Cross multiply
    453,900.78x = 680,960.52 × 138,338.28
  4. Step 4: Simplify right side
    453,900.78x = 94,202,907,084.71
  5. Step 5: Solve for x
    x = 94,202,907,084.71/453,900.78
  6. Step 6: Final answer
    x = 207,540.75

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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.