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Finding the Fourth Proportional to 1,357.52, 1,872.77 and 915.26

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Solution

The fourth proportional to 1,357.52, 1,872.77 and 915.26 is: 1,262.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.52 : 1,872.77 = 915.26 : x
  2. Step 2: Convert to fraction form
    1,357.52/1,872.77 = 915.26/x
  3. Step 3: Cross multiply
    1,357.52x = 1,872.77 × 915.26
  4. Step 4: Simplify right side
    1,357.52x = 1,714,057.53
  5. Step 5: Solve for x
    x = 1,714,057.53/1,357.52
  6. Step 6: Final answer
    x = 1,262.64

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