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Finding the Fourth Proportional to 454.80, 627.08 and 307.76

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Solution

The fourth proportional to 454.80, 627.08 and 307.76 is: 424.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.80 : 627.08 = 307.76 : x
  2. Step 2: Convert to fraction form
    454.80/627.08 = 307.76/x
  3. Step 3: Cross multiply
    454.80x = 627.08 × 307.76
  4. Step 4: Simplify right side
    454.80x = 192,990.14
  5. Step 5: Solve for x
    x = 192,990.14/454.80
  6. Step 6: Final answer
    x = 424.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.