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Finding the Fourth Proportional to 454.98, 628.19 and 307.70

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Solution

The fourth proportional to 454.98, 628.19 and 307.70 is: 424.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.98 : 628.19 = 307.70 : x
  2. Step 2: Convert to fraction form
    454.98/628.19 = 307.70/x
  3. Step 3: Cross multiply
    454.98x = 628.19 × 307.70
  4. Step 4: Simplify right side
    454.98x = 193,289.38
  5. Step 5: Solve for x
    x = 193,289.38/454.98
  6. Step 6: Final answer
    x = 424.83

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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.