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Finding the Fourth Proportional to 580.75, 801.14 and 394.18

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Solution

The fourth proportional to 580.75, 801.14 and 394.18 is: 543.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.75 : 801.14 = 394.18 : x
  2. Step 2: Convert to fraction form
    580.75/801.14 = 394.18/x
  3. Step 3: Cross multiply
    580.75x = 801.14 × 394.18
  4. Step 4: Simplify right side
    580.75x = 315,793.37
  5. Step 5: Solve for x
    x = 315,793.37/580.75
  6. Step 6: Final answer
    x = 543.77

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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.