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Finding the Fourth Proportional to 644.61, 964.49 and 370.83

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Solution

The fourth proportional to 644.61, 964.49 and 370.83 is: 554.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.61 : 964.49 = 370.83 : x
  2. Step 2: Convert to fraction form
    644.61/964.49 = 370.83/x
  3. Step 3: Cross multiply
    644.61x = 964.49 × 370.83
  4. Step 4: Simplify right side
    644.61x = 357,659.97
  5. Step 5: Solve for x
    x = 357,659.97/644.61
  6. Step 6: Final answer
    x = 554.85

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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.