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Finding the Fourth Proportional to 625.98, 864.15 and 416.50

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Solution

The fourth proportional to 625.98, 864.15 and 416.50 is: 574.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.98 : 864.15 = 416.50 : x
  2. Step 2: Convert to fraction form
    625.98/864.15 = 416.50/x
  3. Step 3: Cross multiply
    625.98x = 864.15 × 416.50
  4. Step 4: Simplify right side
    625.98x = 359,921.96
  5. Step 5: Solve for x
    x = 359,921.96/625.98
  6. Step 6: Final answer
    x = 574.98

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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.