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Finding the Fourth Proportional to 1,108.85, 1,663.62 and 560.74

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Solution

The fourth proportional to 1,108.85, 1,663.62 and 560.74 is: 841.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.85 : 1,663.62 = 560.74 : x
  2. Step 2: Convert to fraction form
    1,108.85/1,663.62 = 560.74/x
  3. Step 3: Cross multiply
    1,108.85x = 1,663.62 × 560.74
  4. Step 4: Simplify right side
    1,108.85x = 932,858.28
  5. Step 5: Solve for x
    x = 932,858.28/1,108.85
  6. Step 6: Final answer
    x = 841.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.