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Finding the Fourth Proportional to 551.80, 828.06 and 278.20

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Solution

The fourth proportional to 551.80, 828.06 and 278.20 is: 417.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.80 : 828.06 = 278.20 : x
  2. Step 2: Convert to fraction form
    551.80/828.06 = 278.20/x
  3. Step 3: Cross multiply
    551.80x = 828.06 × 278.20
  4. Step 4: Simplify right side
    551.80x = 230,366.29
  5. Step 5: Solve for x
    x = 230,366.29/551.80
  6. Step 6: Final answer
    x = 417.48

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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.