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Finding the Fourth Proportional to 678,478.85, 936,258.22 and 372,553.08

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Solution

The fourth proportional to 678,478.85, 936,258.22 and 372,553.08 is: 514,099.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,478.85 : 936,258.22 = 372,553.08 : x
  2. Step 2: Convert to fraction form
    678,478.85/936,258.22 = 372,553.08/x
  3. Step 3: Cross multiply
    678,478.85x = 936,258.22 × 372,553.08
  4. Step 4: Simplify right side
    678,478.85x = 348,805,887,512.98
  5. Step 5: Solve for x
    x = 348,805,887,512.98/678,478.85
  6. Step 6: Final answer
    x = 514,099.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.