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Finding the Fourth Proportional to 392.02, 540.29 and 346.76

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Solution

The fourth proportional to 392.02, 540.29 and 346.76 is: 477.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.02 : 540.29 = 346.76 : x
  2. Step 2: Convert to fraction form
    392.02/540.29 = 346.76/x
  3. Step 3: Cross multiply
    392.02x = 540.29 × 346.76
  4. Step 4: Simplify right side
    392.02x = 187,349.13
  5. Step 5: Solve for x
    x = 187,349.13/392.02
  6. Step 6: Final answer
    x = 477.91

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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.