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Finding the Fourth Proportional to 371.44, 556.12 and 279.86

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Solution

The fourth proportional to 371.44, 556.12 and 279.86 is: 419.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.44 : 556.12 = 279.86 : x
  2. Step 2: Convert to fraction form
    371.44/556.12 = 279.86/x
  3. Step 3: Cross multiply
    371.44x = 556.12 × 279.86
  4. Step 4: Simplify right side
    371.44x = 155,631.74
  5. Step 5: Solve for x
    x = 155,631.74/371.44
  6. Step 6: Final answer
    x = 419.00

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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.