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Finding the Fourth Proportional to 1,125.82, 1,553.37 and 653.79

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Solution

The fourth proportional to 1,125.82, 1,553.37 and 653.79 is: 902.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.82 : 1,553.37 = 653.79 : x
  2. Step 2: Convert to fraction form
    1,125.82/1,553.37 = 653.79/x
  3. Step 3: Cross multiply
    1,125.82x = 1,553.37 × 653.79
  4. Step 4: Simplify right side
    1,125.82x = 1,015,577.77
  5. Step 5: Solve for x
    x = 1,015,577.77/1,125.82
  6. Step 6: Final answer
    x = 902.08

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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.