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Finding the Fourth Proportional to 295.87, 443.80 and 90.43

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Solution

The fourth proportional to 295.87, 443.80 and 90.43 is: 135.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.87 : 443.80 = 90.43 : x
  2. Step 2: Convert to fraction form
    295.87/443.80 = 90.43/x
  3. Step 3: Cross multiply
    295.87x = 443.80 × 90.43
  4. Step 4: Simplify right side
    295.87x = 40,132.83
  5. Step 5: Solve for x
    x = 40,132.83/295.87
  6. Step 6: Final answer
    x = 135.64

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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.