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Finding the Fourth Proportional to 439.07, 606.19 and 281.76

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Solution

The fourth proportional to 439.07, 606.19 and 281.76 is: 389.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.07 : 606.19 = 281.76 : x
  2. Step 2: Convert to fraction form
    439.07/606.19 = 281.76/x
  3. Step 3: Cross multiply
    439.07x = 606.19 × 281.76
  4. Step 4: Simplify right side
    439.07x = 170,803.55
  5. Step 5: Solve for x
    x = 170,803.55/439.07
  6. Step 6: Final answer
    x = 389.02

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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.