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Finding the Fourth Proportional to 653,385.28, 901,769.52 and 398,884

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Solution

The fourth proportional to 653,385.28, 901,769.52 and 398,884 is: 550,519.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,385.28 : 901,769.52 = 398,884 : x
  2. Step 2: Convert to fraction form
    653,385.28/901,769.52 = 398,884/x
  3. Step 3: Cross multiply
    653,385.28x = 901,769.52 × 398,884
  4. Step 4: Simplify right side
    653,385.28x = 359,701,433,215.68
  5. Step 5: Solve for x
    x = 359,701,433,215.68/653,385.28
  6. Step 6: Final answer
    x = 550,519.65

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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.