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Finding the Fourth Proportional to 403, 556.16 and 247.76

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Solution

The fourth proportional to 403, 556.16 and 247.76 is: 341.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    403 : 556.16 = 247.76 : x
  2. Step 2: Convert to fraction form
    403/556.16 = 247.76/x
  3. Step 3: Cross multiply
    403x = 556.16 × 247.76
  4. Step 4: Simplify right side
    403x = 137,794.20
  5. Step 5: Solve for x
    x = 137,794.20/403
  6. Step 6: Final answer
    x = 341.92

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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.