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Finding the Fourth Proportional to 485.91, 729.27 and 242.46

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Solution

The fourth proportional to 485.91, 729.27 and 242.46 is: 363.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.91 : 729.27 = 242.46 : x
  2. Step 2: Convert to fraction form
    485.91/729.27 = 242.46/x
  3. Step 3: Cross multiply
    485.91x = 729.27 × 242.46
  4. Step 4: Simplify right side
    485.91x = 176,818.80
  5. Step 5: Solve for x
    x = 176,818.80/485.91
  6. Step 6: Final answer
    x = 363.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.