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Finding the Fourth Proportional to 625.07, 937.16 and 390.89

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Solution

The fourth proportional to 625.07, 937.16 and 390.89 is: 586.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.07 : 937.16 = 390.89 : x
  2. Step 2: Convert to fraction form
    625.07/937.16 = 390.89/x
  3. Step 3: Cross multiply
    625.07x = 937.16 × 390.89
  4. Step 4: Simplify right side
    625.07x = 366,324.52
  5. Step 5: Solve for x
    x = 366,324.52/625.07
  6. Step 6: Final answer
    x = 586.05

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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.