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Finding the Fourth Proportional to 404.55, 558.32 and 247.28

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Solution

The fourth proportional to 404.55, 558.32 and 247.28 is: 341.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.55 : 558.32 = 247.28 : x
  2. Step 2: Convert to fraction form
    404.55/558.32 = 247.28/x
  3. Step 3: Cross multiply
    404.55x = 558.32 × 247.28
  4. Step 4: Simplify right side
    404.55x = 138,057.34
  5. Step 5: Solve for x
    x = 138,057.34/404.55
  6. Step 6: Final answer
    x = 341.26

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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.