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Finding the Fourth Proportional to 404.89, 606.28 and 281.30

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Solution

The fourth proportional to 404.89, 606.28 and 281.30 is: 421.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.89 : 606.28 = 281.30 : x
  2. Step 2: Convert to fraction form
    404.89/606.28 = 281.30/x
  3. Step 3: Cross multiply
    404.89x = 606.28 × 281.30
  4. Step 4: Simplify right side
    404.89x = 170,547.38
  5. Step 5: Solve for x
    x = 170,547.38/404.89
  6. Step 6: Final answer
    x = 421.22

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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.