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Finding the Fourth Proportional to 1,361.58, 1,877.32 and 1,151.38

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Solution

The fourth proportional to 1,361.58, 1,877.32 and 1,151.38 is: 1,587.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.58 : 1,877.32 = 1,151.38 : x
  2. Step 2: Convert to fraction form
    1,361.58/1,877.32 = 1,151.38/x
  3. Step 3: Cross multiply
    1,361.58x = 1,877.32 × 1,151.38
  4. Step 4: Simplify right side
    1,361.58x = 2,161,508.70
  5. Step 5: Solve for x
    x = 2,161,508.70/1,361.58
  6. Step 6: Final answer
    x = 1,587.50

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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.