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Finding the Fourth Proportional to 975.44, 1,463.72 and 398.80

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Solution

The fourth proportional to 975.44, 1,463.72 and 398.80 is: 598.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.44 : 1,463.72 = 398.80 : x
  2. Step 2: Convert to fraction form
    975.44/1,463.72 = 398.80/x
  3. Step 3: Cross multiply
    975.44x = 1,463.72 × 398.80
  4. Step 4: Simplify right side
    975.44x = 583,731.54
  5. Step 5: Solve for x
    x = 583,731.54/975.44
  6. Step 6: Final answer
    x = 598.43

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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.