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Finding the Fourth Proportional to 624.80, 862.14 and 345

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Solution

The fourth proportional to 624.80, 862.14 and 345 is: 476.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.80 : 862.14 = 345 : x
  2. Step 2: Convert to fraction form
    624.80/862.14 = 345/x
  3. Step 3: Cross multiply
    624.80x = 862.14 × 345
  4. Step 4: Simplify right side
    624.80x = 297,438.30
  5. Step 5: Solve for x
    x = 297,438.30/624.80
  6. Step 6: Final answer
    x = 476.05

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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.