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Finding the Fourth Proportional to 1,171.53, 1,757.30 and 478.58

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Solution

The fourth proportional to 1,171.53, 1,757.30 and 478.58 is: 717.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.53 : 1,757.30 = 478.58 : x
  2. Step 2: Convert to fraction form
    1,171.53/1,757.30 = 478.58/x
  3. Step 3: Cross multiply
    1,171.53x = 1,757.30 × 478.58
  4. Step 4: Simplify right side
    1,171.53x = 841,008.63
  5. Step 5: Solve for x
    x = 841,008.63/1,171.53
  6. Step 6: Final answer
    x = 717.87

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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.