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Finding the Fourth Proportional to 674.60, 934.02 and 661.80

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Solution

The fourth proportional to 674.60, 934.02 and 661.80 is: 916.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.60 : 934.02 = 661.80 : x
  2. Step 2: Convert to fraction form
    674.60/934.02 = 661.80/x
  3. Step 3: Cross multiply
    674.60x = 934.02 × 661.80
  4. Step 4: Simplify right side
    674.60x = 618,134.44
  5. Step 5: Solve for x
    x = 618,134.44/674.60
  6. Step 6: Final answer
    x = 916.30

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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.