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Finding the Fourth Proportional to 708, 1,062.72 and 492

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Solution

The fourth proportional to 708, 1,062.72 and 492 is: 738.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    708 : 1,062.72 = 492 : x
  2. Step 2: Convert to fraction form
    708/1,062.72 = 492/x
  3. Step 3: Cross multiply
    708x = 1,062.72 × 492
  4. Step 4: Simplify right side
    708x = 522,858.24
  5. Step 5: Solve for x
    x = 522,858.24/708
  6. Step 6: Final answer
    x = 738.50

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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.