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Finding the Fourth Proportional to 392.24, 584.01 and 391.03

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Solution

The fourth proportional to 392.24, 584.01 and 391.03 is: 582.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.24 : 584.01 = 391.03 : x
  2. Step 2: Convert to fraction form
    392.24/584.01 = 391.03/x
  3. Step 3: Cross multiply
    392.24x = 584.01 × 391.03
  4. Step 4: Simplify right side
    392.24x = 228,363.97
  5. Step 5: Solve for x
    x = 228,363.97/392.24
  6. Step 6: Final answer
    x = 582.20

Related Problems

Find fourth proportional to 196.12, 292.01 and 195.51
Half scale
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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.