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Finding the Fourth Proportional to 410.91, 566.96 and 280.05

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Solution

The fourth proportional to 410.91, 566.96 and 280.05 is: 386.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.91 : 566.96 = 280.05 : x
  2. Step 2: Convert to fraction form
    410.91/566.96 = 280.05/x
  3. Step 3: Cross multiply
    410.91x = 566.96 × 280.05
  4. Step 4: Simplify right side
    410.91x = 158,775.75
  5. Step 5: Solve for x
    x = 158,775.75/410.91
  6. Step 6: Final answer
    x = 386.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.