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Finding the Fourth Proportional to 674.92, 931.26 and 412.75

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Solution

The fourth proportional to 674.92, 931.26 and 412.75 is: 569.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.92 : 931.26 = 412.75 : x
  2. Step 2: Convert to fraction form
    674.92/931.26 = 412.75/x
  3. Step 3: Cross multiply
    674.92x = 931.26 × 412.75
  4. Step 4: Simplify right side
    674.92x = 384,377.57
  5. Step 5: Solve for x
    x = 384,377.57/674.92
  6. Step 6: Final answer
    x = 569.52

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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.