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Finding the Fourth Proportional to 965.66, 1,447.61 and 388.94

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Solution

The fourth proportional to 965.66, 1,447.61 and 388.94 is: 583.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.66 : 1,447.61 = 388.94 : x
  2. Step 2: Convert to fraction form
    965.66/1,447.61 = 388.94/x
  3. Step 3: Cross multiply
    965.66x = 1,447.61 × 388.94
  4. Step 4: Simplify right side
    965.66x = 563,024.25
  5. Step 5: Solve for x
    x = 563,024.25/965.66
  6. Step 6: Final answer
    x = 583.05

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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.