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Finding the Fourth Proportional to 708.45, 1,062.78 and 297.55

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Solution

The fourth proportional to 708.45, 1,062.78 and 297.55 is: 446.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.45 : 1,062.78 = 297.55 : x
  2. Step 2: Convert to fraction form
    708.45/1,062.78 = 297.55/x
  3. Step 3: Cross multiply
    708.45x = 1,062.78 × 297.55
  4. Step 4: Simplify right side
    708.45x = 316,230.19
  5. Step 5: Solve for x
    x = 316,230.19/708.45
  6. Step 6: Final answer
    x = 446.37

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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.