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Finding the Fourth Proportional to 324.50, 484.76 and 318.74

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Solution

The fourth proportional to 324.50, 484.76 and 318.74 is: 476.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.50 : 484.76 = 318.74 : x
  2. Step 2: Convert to fraction form
    324.50/484.76 = 318.74/x
  3. Step 3: Cross multiply
    324.50x = 484.76 × 318.74
  4. Step 4: Simplify right side
    324.50x = 154,510.78
  5. Step 5: Solve for x
    x = 154,510.78/324.50
  6. Step 6: Final answer
    x = 476.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.