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Finding the Fourth Proportional to 708.13, 1,062.20 and 297.16

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Solution

The fourth proportional to 708.13, 1,062.20 and 297.16 is: 445.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.13 : 1,062.20 = 297.16 : x
  2. Step 2: Convert to fraction form
    708.13/1,062.20 = 297.16/x
  3. Step 3: Cross multiply
    708.13x = 1,062.20 × 297.16
  4. Step 4: Simplify right side
    708.13x = 315,639.77
  5. Step 5: Solve for x
    x = 315,639.77/708.13
  6. Step 6: Final answer
    x = 445.74

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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.