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Finding the Fourth Proportional to 625.51, 938.66 and 578.45

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Solution

The fourth proportional to 625.51, 938.66 and 578.45 is: 868.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.51 : 938.66 = 578.45 : x
  2. Step 2: Convert to fraction form
    625.51/938.66 = 578.45/x
  3. Step 3: Cross multiply
    625.51x = 938.66 × 578.45
  4. Step 4: Simplify right side
    625.51x = 542,964.98
  5. Step 5: Solve for x
    x = 542,964.98/625.51
  6. Step 6: Final answer
    x = 868.04

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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.