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Finding the Fourth Proportional to 975.74, 1,463.60 and 326.45

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Solution

The fourth proportional to 975.74, 1,463.60 and 326.45 is: 489.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.74 : 1,463.60 = 326.45 : x
  2. Step 2: Convert to fraction form
    975.74/1,463.60 = 326.45/x
  3. Step 3: Cross multiply
    975.74x = 1,463.60 × 326.45
  4. Step 4: Simplify right side
    975.74x = 477,796.70
  5. Step 5: Solve for x
    x = 477,796.70/975.74
  6. Step 6: Final answer
    x = 489.68

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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.