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Finding the Fourth Proportional to 625.09, 937.75 and 312.76

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Solution

The fourth proportional to 625.09, 937.75 and 312.76 is: 469.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.09 : 937.75 = 312.76 : x
  2. Step 2: Convert to fraction form
    625.09/937.75 = 312.76/x
  3. Step 3: Cross multiply
    625.09x = 937.75 × 312.76
  4. Step 4: Simplify right side
    625.09x = 293,290.69
  5. Step 5: Solve for x
    x = 293,290.69/625.09
  6. Step 6: Final answer
    x = 469.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.