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Finding the Fourth Proportional to 1,261.78, 1,741.60 and 737.71

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Solution

The fourth proportional to 1,261.78, 1,741.60 and 737.71 is: 1,018.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.78 : 1,741.60 = 737.71 : x
  2. Step 2: Convert to fraction form
    1,261.78/1,741.60 = 737.71/x
  3. Step 3: Cross multiply
    1,261.78x = 1,741.60 × 737.71
  4. Step 4: Simplify right side
    1,261.78x = 1,284,792.30
  5. Step 5: Solve for x
    x = 1,284,792.30/1,261.78
  6. Step 6: Final answer
    x = 1,018.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.