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Finding the Fourth Proportional to 610.96, 843.48 and 387.19

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Solution

The fourth proportional to 610.96, 843.48 and 387.19 is: 534.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.96 : 843.48 = 387.19 : x
  2. Step 2: Convert to fraction form
    610.96/843.48 = 387.19/x
  3. Step 3: Cross multiply
    610.96x = 843.48 × 387.19
  4. Step 4: Simplify right side
    610.96x = 326,587.02
  5. Step 5: Solve for x
    x = 326,587.02/610.96
  6. Step 6: Final answer
    x = 534.55

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Double scale
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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.