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Finding the Fourth Proportional to 1,101.64, 1,520.30 and 659.59

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Solution

The fourth proportional to 1,101.64, 1,520.30 and 659.59 is: 910.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.64 : 1,520.30 = 659.59 : x
  2. Step 2: Convert to fraction form
    1,101.64/1,520.30 = 659.59/x
  3. Step 3: Cross multiply
    1,101.64x = 1,520.30 × 659.59
  4. Step 4: Simplify right side
    1,101.64x = 1,002,774.68
  5. Step 5: Solve for x
    x = 1,002,774.68/1,101.64
  6. Step 6: Final answer
    x = 910.26

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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.