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Finding the Fourth Proportional to 485.78, 732.33 and 454.46

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Solution

The fourth proportional to 485.78, 732.33 and 454.46 is: 685.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.78 : 732.33 = 454.46 : x
  2. Step 2: Convert to fraction form
    485.78/732.33 = 454.46/x
  3. Step 3: Cross multiply
    485.78x = 732.33 × 454.46
  4. Step 4: Simplify right side
    485.78x = 332,811.72
  5. Step 5: Solve for x
    x = 332,811.72/485.78
  6. Step 6: Final answer
    x = 685.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.