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Finding the Fourth Proportional to 647.97, 970.38 and 631.53

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Solution

The fourth proportional to 647.97, 970.38 and 631.53 is: 945.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.97 : 970.38 = 631.53 : x
  2. Step 2: Convert to fraction form
    647.97/970.38 = 631.53/x
  3. Step 3: Cross multiply
    647.97x = 970.38 × 631.53
  4. Step 4: Simplify right side
    647.97x = 612,824.08
  5. Step 5: Solve for x
    x = 612,824.08/647.97
  6. Step 6: Final answer
    x = 945.76

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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.