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Finding the Fourth Proportional to 625.61, 864.10 and 468.94

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Solution

The fourth proportional to 625.61, 864.10 and 468.94 is: 647.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.61 : 864.10 = 468.94 : x
  2. Step 2: Convert to fraction form
    625.61/864.10 = 468.94/x
  3. Step 3: Cross multiply
    625.61x = 864.10 × 468.94
  4. Step 4: Simplify right side
    625.61x = 405,211.05
  5. Step 5: Solve for x
    x = 405,211.05/625.61
  6. Step 6: Final answer
    x = 647.71

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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.