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Finding the Fourth Proportional to 281.32, 418.98 and 278.08

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Solution

The fourth proportional to 281.32, 418.98 and 278.08 is: 414.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.32 : 418.98 = 278.08 : x
  2. Step 2: Convert to fraction form
    281.32/418.98 = 278.08/x
  3. Step 3: Cross multiply
    281.32x = 418.98 × 278.08
  4. Step 4: Simplify right side
    281.32x = 116,509.96
  5. Step 5: Solve for x
    x = 116,509.96/281.32
  6. Step 6: Final answer
    x = 414.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.