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Finding the Fourth Proportional to 1,171.31, 1,756.49 and 478.33

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Solution

The fourth proportional to 1,171.31, 1,756.49 and 478.33 is: 717.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.31 : 1,756.49 = 478.33 : x
  2. Step 2: Convert to fraction form
    1,171.31/1,756.49 = 478.33/x
  3. Step 3: Cross multiply
    1,171.31x = 1,756.49 × 478.33
  4. Step 4: Simplify right side
    1,171.31x = 840,175.08
  5. Step 5: Solve for x
    x = 840,175.08/1,171.31
  6. Step 6: Final answer
    x = 717.30

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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.