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Finding the Fourth Proportional to 625.28, 860.74 and 514.58

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Solution

The fourth proportional to 625.28, 860.74 and 514.58 is: 708.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.28 : 860.74 = 514.58 : x
  2. Step 2: Convert to fraction form
    625.28/860.74 = 514.58/x
  3. Step 3: Cross multiply
    625.28x = 860.74 × 514.58
  4. Step 4: Simplify right side
    625.28x = 442,919.59
  5. Step 5: Solve for x
    x = 442,919.59/625.28
  6. Step 6: Final answer
    x = 708.35

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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.