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Finding the Fourth Proportional to 674.92, 931.60 and 422.98

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Solution

The fourth proportional to 674.92, 931.60 and 422.98 is: 583.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.92 : 931.60 = 422.98 : x
  2. Step 2: Convert to fraction form
    674.92/931.60 = 422.98/x
  3. Step 3: Cross multiply
    674.92x = 931.60 × 422.98
  4. Step 4: Simplify right side
    674.92x = 394,048.17
  5. Step 5: Solve for x
    x = 394,048.17/674.92
  6. Step 6: Final answer
    x = 583.84

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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.