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Finding the Fourth Proportional to 392.94, 542.68 and 368.36

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Solution

The fourth proportional to 392.94, 542.68 and 368.36 is: 508.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.94 : 542.68 = 368.36 : x
  2. Step 2: Convert to fraction form
    392.94/542.68 = 368.36/x
  3. Step 3: Cross multiply
    392.94x = 542.68 × 368.36
  4. Step 4: Simplify right side
    392.94x = 199,901.60
  5. Step 5: Solve for x
    x = 199,901.60/392.94
  6. Step 6: Final answer
    x = 508.73

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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.