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Finding the Fourth Proportional to 485.63, 728.01 and 242.23

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Solution

The fourth proportional to 485.63, 728.01 and 242.23 is: 363.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.63 : 728.01 = 242.23 : x
  2. Step 2: Convert to fraction form
    485.63/728.01 = 242.23/x
  3. Step 3: Cross multiply
    485.63x = 728.01 × 242.23
  4. Step 4: Simplify right side
    485.63x = 176,344.65
  5. Step 5: Solve for x
    x = 176,344.65/485.63
  6. Step 6: Final answer
    x = 363.13

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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.