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Finding the Fourth Proportional to 708.03, 981.68 and 685.25

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Solution

The fourth proportional to 708.03, 981.68 and 685.25 is: 950.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.03 : 981.68 = 685.25 : x
  2. Step 2: Convert to fraction form
    708.03/981.68 = 685.25/x
  3. Step 3: Cross multiply
    708.03x = 981.68 × 685.25
  4. Step 4: Simplify right side
    708.03x = 672,687.89
  5. Step 5: Solve for x
    x = 672,687.89/708.03
  6. Step 6: Final answer
    x = 950.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.