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Finding the Fourth Proportional to 295.74, 443.61 and 90.31

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Solution

The fourth proportional to 295.74, 443.61 and 90.31 is: 135.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.74 : 443.61 = 90.31 : x
  2. Step 2: Convert to fraction form
    295.74/443.61 = 90.31/x
  3. Step 3: Cross multiply
    295.74x = 443.61 × 90.31
  4. Step 4: Simplify right side
    295.74x = 40,061.54
  5. Step 5: Solve for x
    x = 40,061.54/295.74
  6. Step 6: Final answer
    x = 135.46

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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.