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Finding the Fourth Proportional to 1,102.98, 1,654.48 and 409.70

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Solution

The fourth proportional to 1,102.98, 1,654.48 and 409.70 is: 614.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.98 : 1,654.48 = 409.70 : x
  2. Step 2: Convert to fraction form
    1,102.98/1,654.48 = 409.70/x
  3. Step 3: Cross multiply
    1,102.98x = 1,654.48 × 409.70
  4. Step 4: Simplify right side
    1,102.98x = 677,840.46
  5. Step 5: Solve for x
    x = 677,840.46/1,102.98
  6. Step 6: Final answer
    x = 614.55

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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.