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Finding the Fourth Proportional to 1,357.97, 1,872.92 and 1,008.05

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Solution

The fourth proportional to 1,357.97, 1,872.92 and 1,008.05 is: 1,390.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.97 : 1,872.92 = 1,008.05 : x
  2. Step 2: Convert to fraction form
    1,357.97/1,872.92 = 1,008.05/x
  3. Step 3: Cross multiply
    1,357.97x = 1,872.92 × 1,008.05
  4. Step 4: Simplify right side
    1,357.97x = 1,887,990.16
  5. Step 5: Solve for x
    x = 1,887,990.16/1,357.97
  6. Step 6: Final answer
    x = 1,390.31

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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.