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Finding the Fourth Proportional to 1,011.53, 1,517.91 and 434.41

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Solution

The fourth proportional to 1,011.53, 1,517.91 and 434.41 is: 651.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.53 : 1,517.91 = 434.41 : x
  2. Step 2: Convert to fraction form
    1,011.53/1,517.91 = 434.41/x
  3. Step 3: Cross multiply
    1,011.53x = 1,517.91 × 434.41
  4. Step 4: Simplify right side
    1,011.53x = 659,395.28
  5. Step 5: Solve for x
    x = 659,395.28/1,011.53
  6. Step 6: Final answer
    x = 651.88

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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.