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Finding the Fourth Proportional to 302.60, 454.08 and 278.48

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Solution

The fourth proportional to 302.60, 454.08 and 278.48 is: 417.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.60 : 454.08 = 278.48 : x
  2. Step 2: Convert to fraction form
    302.60/454.08 = 278.48/x
  3. Step 3: Cross multiply
    302.60x = 454.08 × 278.48
  4. Step 4: Simplify right side
    302.60x = 126,452.20
  5. Step 5: Solve for x
    x = 126,452.20/302.60
  6. Step 6: Final answer
    x = 417.89

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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.