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Finding the Fourth Proportional to 392.60, 541.14 and 281.90

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Solution

The fourth proportional to 392.60, 541.14 and 281.90 is: 388.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.60 : 541.14 = 281.90 : x
  2. Step 2: Convert to fraction form
    392.60/541.14 = 281.90/x
  3. Step 3: Cross multiply
    392.60x = 541.14 × 281.90
  4. Step 4: Simplify right side
    392.60x = 152,547.37
  5. Step 5: Solve for x
    x = 152,547.37/392.60
  6. Step 6: Final answer
    x = 388.56

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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.