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Finding the Fourth Proportional to 649.37, 970.00 and 638.44

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Solution

The fourth proportional to 649.37, 970.00 and 638.44 is: 953.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.37 : 970.00 = 638.44 : x
  2. Step 2: Convert to fraction form
    649.37/970.00 = 638.44/x
  3. Step 3: Cross multiply
    649.37x = 970.00 × 638.44
  4. Step 4: Simplify right side
    649.37x = 619,282.78
  5. Step 5: Solve for x
    x = 619,282.78/649.37
  6. Step 6: Final answer
    x = 953.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.