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Finding the Fourth Proportional to 1,261.52, 1,892.21 and 337.15

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Solution

The fourth proportional to 1,261.52, 1,892.21 and 337.15 is: 505.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.52 : 1,892.21 = 337.15 : x
  2. Step 2: Convert to fraction form
    1,261.52/1,892.21 = 337.15/x
  3. Step 3: Cross multiply
    1,261.52x = 1,892.21 × 337.15
  4. Step 4: Simplify right side
    1,261.52x = 637,954.71
  5. Step 5: Solve for x
    x = 637,954.71/1,261.52
  6. Step 6: Final answer
    x = 505.70

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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.