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Finding the Fourth Proportional to 708.16, 1,062.12 and 342.85

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Solution

The fourth proportional to 708.16, 1,062.12 and 342.85 is: 514.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.16 : 1,062.12 = 342.85 : x
  2. Step 2: Convert to fraction form
    708.16/1,062.12 = 342.85/x
  3. Step 3: Cross multiply
    708.16x = 1,062.12 × 342.85
  4. Step 4: Simplify right side
    708.16x = 364,142.53
  5. Step 5: Solve for x
    x = 364,142.53/708.16
  6. Step 6: Final answer
    x = 514.21

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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.