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Finding the Fourth Proportional to 1,140.61, 1,711.58 and 447.25

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Solution

The fourth proportional to 1,140.61, 1,711.58 and 447.25 is: 671.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.61 : 1,711.58 = 447.25 : x
  2. Step 2: Convert to fraction form
    1,140.61/1,711.58 = 447.25/x
  3. Step 3: Cross multiply
    1,140.61x = 1,711.58 × 447.25
  4. Step 4: Simplify right side
    1,140.61x = 765,504.16
  5. Step 5: Solve for x
    x = 765,504.16/1,140.61
  6. Step 6: Final answer
    x = 671.14

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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.