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Finding the Fourth Proportional to 708.77, 1,063.49 and 343.35

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Solution

The fourth proportional to 708.77, 1,063.49 and 343.35 is: 515.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.77 : 1,063.49 = 343.35 : x
  2. Step 2: Convert to fraction form
    708.77/1,063.49 = 343.35/x
  3. Step 3: Cross multiply
    708.77x = 1,063.49 × 343.35
  4. Step 4: Simplify right side
    708.77x = 365,147.57
  5. Step 5: Solve for x
    x = 365,147.57/708.77
  6. Step 6: Final answer
    x = 515.19

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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.