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Finding the Fourth Proportional to 937.35, 1,292.84 and 688.59

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Solution

The fourth proportional to 937.35, 1,292.84 and 688.59 is: 949.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.35 : 1,292.84 = 688.59 : x
  2. Step 2: Convert to fraction form
    937.35/1,292.84 = 688.59/x
  3. Step 3: Cross multiply
    937.35x = 1,292.84 × 688.59
  4. Step 4: Simplify right side
    937.35x = 890,236.70
  5. Step 5: Solve for x
    x = 890,236.70/937.35
  6. Step 6: Final answer
    x = 949.74

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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.