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Finding the Fourth Proportional to 708.70, 976.35 and 675.90

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Solution

The fourth proportional to 708.70, 976.35 and 675.90 is: 931.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.70 : 976.35 = 675.90 : x
  2. Step 2: Convert to fraction form
    708.70/976.35 = 675.90/x
  3. Step 3: Cross multiply
    708.70x = 976.35 × 675.90
  4. Step 4: Simplify right side
    708.70x = 659,914.97
  5. Step 5: Solve for x
    x = 659,914.97/708.70
  6. Step 6: Final answer
    x = 931.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.