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Finding the Fourth Proportional to 644.97, 965.54 and 425.18

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Solution

The fourth proportional to 644.97, 965.54 and 425.18 is: 636.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.97 : 965.54 = 425.18 : x
  2. Step 2: Convert to fraction form
    644.97/965.54 = 425.18/x
  3. Step 3: Cross multiply
    644.97x = 965.54 × 425.18
  4. Step 4: Simplify right side
    644.97x = 410,526.17
  5. Step 5: Solve for x
    x = 410,526.17/644.97
  6. Step 6: Final answer
    x = 636.50

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Double scale
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1.5x scale

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.