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Finding the Fourth Proportional to 1,255.53, 1,881.24 and 561.17

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Solution

The fourth proportional to 1,255.53, 1,881.24 and 561.17 is: 840.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.53 : 1,881.24 = 561.17 : x
  2. Step 2: Convert to fraction form
    1,255.53/1,881.24 = 561.17/x
  3. Step 3: Cross multiply
    1,255.53x = 1,881.24 × 561.17
  4. Step 4: Simplify right side
    1,255.53x = 1,055,686.04
  5. Step 5: Solve for x
    x = 1,055,686.04/1,255.53
  6. Step 6: Final answer
    x = 840.83

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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.