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Finding the Fourth Proportional to 409.58, 565.28 and 278.62

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Solution

The fourth proportional to 409.58, 565.28 and 278.62 is: 384.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.58 : 565.28 = 278.62 : x
  2. Step 2: Convert to fraction form
    409.58/565.28 = 278.62/x
  3. Step 3: Cross multiply
    409.58x = 565.28 × 278.62
  4. Step 4: Simplify right side
    409.58x = 157,498.31
  5. Step 5: Solve for x
    x = 157,498.31/409.58
  6. Step 6: Final answer
    x = 384.54

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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.