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Finding the Fourth Proportional to 1,537.95, 2,122.37 and 839.32

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Solution

The fourth proportional to 1,537.95, 2,122.37 and 839.32 is: 1,158.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.95 : 2,122.37 = 839.32 : x
  2. Step 2: Convert to fraction form
    1,537.95/2,122.37 = 839.32/x
  3. Step 3: Cross multiply
    1,537.95x = 2,122.37 × 839.32
  4. Step 4: Simplify right side
    1,537.95x = 1,781,353.17
  5. Step 5: Solve for x
    x = 1,781,353.17/1,537.95
  6. Step 6: Final answer
    x = 1,158.27

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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.