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Finding the Fourth Proportional to 965.64, 1,447.54 and 478.42

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Solution

The fourth proportional to 965.64, 1,447.54 and 478.42 is: 717.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.64 : 1,447.54 = 478.42 : x
  2. Step 2: Convert to fraction form
    965.64/1,447.54 = 478.42/x
  3. Step 3: Cross multiply
    965.64x = 1,447.54 × 478.42
  4. Step 4: Simplify right side
    965.64x = 692,535.41
  5. Step 5: Solve for x
    x = 692,535.41/965.64
  6. Step 6: Final answer
    x = 717.18

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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.