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Finding the Fourth Proportional to 404.47, 558.14 and 229.81

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Solution

The fourth proportional to 404.47, 558.14 and 229.81 is: 317.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.47 : 558.14 = 229.81 : x
  2. Step 2: Convert to fraction form
    404.47/558.14 = 229.81/x
  3. Step 3: Cross multiply
    404.47x = 558.14 × 229.81
  4. Step 4: Simplify right side
    404.47x = 128,263.94
  5. Step 5: Solve for x
    x = 128,263.94/404.47
  6. Step 6: Final answer
    x = 317.12

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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.