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Finding the Fourth Proportional to 712.90, 1,068.24 and 480.97

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Solution

The fourth proportional to 712.90, 1,068.24 and 480.97 is: 720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.90 : 1,068.24 = 480.97 : x
  2. Step 2: Convert to fraction form
    712.90/1,068.24 = 480.97/x
  3. Step 3: Cross multiply
    712.90x = 1,068.24 × 480.97
  4. Step 4: Simplify right side
    712.90x = 513,786.05
  5. Step 5: Solve for x
    x = 513,786.05/712.90
  6. Step 6: Final answer
    x = 720.70

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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.