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Finding the Fourth Proportional to 1,101.98, 1,520.70 and 659.66

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Solution

The fourth proportional to 1,101.98, 1,520.70 and 659.66 is: 910.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.98 : 1,520.70 = 659.66 : x
  2. Step 2: Convert to fraction form
    1,101.98/1,520.70 = 659.66/x
  3. Step 3: Cross multiply
    1,101.98x = 1,520.70 × 659.66
  4. Step 4: Simplify right side
    1,101.98x = 1,003,144.96
  5. Step 5: Solve for x
    x = 1,003,144.96/1,101.98
  6. Step 6: Final answer
    x = 910.31

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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.