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Finding the Fourth Proportional to 409.96, 565.30 and 291.88

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Solution

The fourth proportional to 409.96, 565.30 and 291.88 is: 402.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.96 : 565.30 = 291.88 : x
  2. Step 2: Convert to fraction form
    409.96/565.30 = 291.88/x
  3. Step 3: Cross multiply
    409.96x = 565.30 × 291.88
  4. Step 4: Simplify right side
    409.96x = 164,999.76
  5. Step 5: Solve for x
    x = 164,999.76/409.96
  6. Step 6: Final answer
    x = 402.48

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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.