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Finding the Fourth Proportional to 1,091.59, 1,637.58 and 442.78

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Solution

The fourth proportional to 1,091.59, 1,637.58 and 442.78 is: 664.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.59 : 1,637.58 = 442.78 : x
  2. Step 2: Convert to fraction form
    1,091.59/1,637.58 = 442.78/x
  3. Step 3: Cross multiply
    1,091.59x = 1,637.58 × 442.78
  4. Step 4: Simplify right side
    1,091.59x = 725,079.48
  5. Step 5: Solve for x
    x = 725,079.48/1,091.59
  6. Step 6: Final answer
    x = 664.24

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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.