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Finding the Fourth Proportional to 1,103.51, 1,654.61 and 486.90

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Solution

The fourth proportional to 1,103.51, 1,654.61 and 486.90 is: 730.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.51 : 1,654.61 = 486.90 : x
  2. Step 2: Convert to fraction form
    1,103.51/1,654.61 = 486.90/x
  3. Step 3: Cross multiply
    1,103.51x = 1,654.61 × 486.90
  4. Step 4: Simplify right side
    1,103.51x = 805,627.17
  5. Step 5: Solve for x
    x = 805,627.17/1,103.51
  6. Step 6: Final answer
    x = 730.06

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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.