Home / 1,265.25-1,898.20-432.30

Finding the Fourth Proportional to 1,265.25, 1,898.20 and 432.30

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Solution

The fourth proportional to 1,265.25, 1,898.20 and 432.30 is: 648.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.25 : 1,898.20 = 432.30 : x
  2. Step 2: Convert to fraction form
    1,265.25/1,898.20 = 432.30/x
  3. Step 3: Cross multiply
    1,265.25x = 1,898.20 × 432.30
  4. Step 4: Simplify right side
    1,265.25x = 820,591.86
  5. Step 5: Solve for x
    x = 820,591.86/1,265.25
  6. Step 6: Final answer
    x = 648.56

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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.