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Finding the Fourth Proportional to 392.95, 542.26 and 235.65

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Solution

The fourth proportional to 392.95, 542.26 and 235.65 is: 325.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.95 : 542.26 = 235.65 : x
  2. Step 2: Convert to fraction form
    392.95/542.26 = 235.65/x
  3. Step 3: Cross multiply
    392.95x = 542.26 × 235.65
  4. Step 4: Simplify right side
    392.95x = 127,783.57
  5. Step 5: Solve for x
    x = 127,783.57/392.95
  6. Step 6: Final answer
    x = 325.19

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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.