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Finding the Fourth Proportional to 295.70, 443.55 and 280.10

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Solution

The fourth proportional to 295.70, 443.55 and 280.10 is: 420.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.70 : 443.55 = 280.10 : x
  2. Step 2: Convert to fraction form
    295.70/443.55 = 280.10/x
  3. Step 3: Cross multiply
    295.70x = 443.55 × 280.10
  4. Step 4: Simplify right side
    295.70x = 124,238.36
  5. Step 5: Solve for x
    x = 124,238.36/295.70
  6. Step 6: Final answer
    x = 420.15

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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.