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Finding the Fourth Proportional to 691,591.50, 954,425.43 and 389,785.50

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Solution

The fourth proportional to 691,591.50, 954,425.43 and 389,785.50 is: 537,920.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,591.50 : 954,425.43 = 389,785.50 : x
  2. Step 2: Convert to fraction form
    691,591.50/954,425.43 = 389,785.50/x
  3. Step 3: Cross multiply
    691,591.50x = 954,425.43 × 389,785.50
  4. Step 4: Simplify right side
    691,591.50x = 372,021,193,445.27
  5. Step 5: Solve for x
    x = 372,021,193,445.27/691,591.50
  6. Step 6: Final answer
    x = 537,920.42

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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.