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Finding the Fourth Proportional to 363.78, 542.60 and 305.32

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Solution

The fourth proportional to 363.78, 542.60 and 305.32 is: 455.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.78 : 542.60 = 305.32 : x
  2. Step 2: Convert to fraction form
    363.78/542.60 = 305.32/x
  3. Step 3: Cross multiply
    363.78x = 542.60 × 305.32
  4. Step 4: Simplify right side
    363.78x = 165,666.63
  5. Step 5: Solve for x
    x = 165,666.63/363.78
  6. Step 6: Final answer
    x = 455.40

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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.