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Finding the Fourth Proportional to 494.54, 740.48 and 378.72

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Solution

The fourth proportional to 494.54, 740.48 and 378.72 is: 567.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.54 : 740.48 = 378.72 : x
  2. Step 2: Convert to fraction form
    494.54/740.48 = 378.72/x
  3. Step 3: Cross multiply
    494.54x = 740.48 × 378.72
  4. Step 4: Simplify right side
    494.54x = 280,434.59
  5. Step 5: Solve for x
    x = 280,434.59/494.54
  6. Step 6: Final answer
    x = 567.06

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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.