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Finding the Fourth Proportional to 1,011.71, 1,517.26 and 353.56

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Solution

The fourth proportional to 1,011.71, 1,517.26 and 353.56 is: 530.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.71 : 1,517.26 = 353.56 : x
  2. Step 2: Convert to fraction form
    1,011.71/1,517.26 = 353.56/x
  3. Step 3: Cross multiply
    1,011.71x = 1,517.26 × 353.56
  4. Step 4: Simplify right side
    1,011.71x = 536,442.45
  5. Step 5: Solve for x
    x = 536,442.45/1,011.71
  6. Step 6: Final answer
    x = 530.23

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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.