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Finding the Fourth Proportional to 495.63, 742.19 and 278.96

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Solution

The fourth proportional to 495.63, 742.19 and 278.96 is: 417.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.63 : 742.19 = 278.96 : x
  2. Step 2: Convert to fraction form
    495.63/742.19 = 278.96/x
  3. Step 3: Cross multiply
    495.63x = 742.19 × 278.96
  4. Step 4: Simplify right side
    495.63x = 207,036.22
  5. Step 5: Solve for x
    x = 207,036.22/495.63
  6. Step 6: Final answer
    x = 417.72

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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.