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Finding the Fourth Proportional to 443.10, 611.67 and 403.74

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Solution

The fourth proportional to 443.10, 611.67 and 403.74 is: 557.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.10 : 611.67 = 403.74 : x
  2. Step 2: Convert to fraction form
    443.10/611.67 = 403.74/x
  3. Step 3: Cross multiply
    443.10x = 611.67 × 403.74
  4. Step 4: Simplify right side
    443.10x = 246,955.65
  5. Step 5: Solve for x
    x = 246,955.65/443.10
  6. Step 6: Final answer
    x = 557.34

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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.