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Finding the Fourth Proportional to 1,537.92, 2,122.36 and 839.32

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Solution

The fourth proportional to 1,537.92, 2,122.36 and 839.32 is: 1,158.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.92 : 2,122.36 = 839.32 : x
  2. Step 2: Convert to fraction form
    1,537.92/2,122.36 = 839.32/x
  3. Step 3: Cross multiply
    1,537.92x = 2,122.36 × 839.32
  4. Step 4: Simplify right side
    1,537.92x = 1,781,339.20
  5. Step 5: Solve for x
    x = 1,781,339.20/1,537.92
  6. Step 6: Final answer
    x = 1,158.28

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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.