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Finding the Fourth Proportional to 965.02, 1,447.51 and 387.76

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Solution

The fourth proportional to 965.02, 1,447.51 and 387.76 is: 581.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.02 : 1,447.51 = 387.76 : x
  2. Step 2: Convert to fraction form
    965.02/1,447.51 = 387.76/x
  3. Step 3: Cross multiply
    965.02x = 1,447.51 × 387.76
  4. Step 4: Simplify right side
    965.02x = 561,286.48
  5. Step 5: Solve for x
    x = 561,286.48/965.02
  6. Step 6: Final answer
    x = 581.63

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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.