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Finding the Fourth Proportional to 443.69, 612.32 and 296.57

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Solution

The fourth proportional to 443.69, 612.32 and 296.57 is: 409.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.69 : 612.32 = 296.57 : x
  2. Step 2: Convert to fraction form
    443.69/612.32 = 296.57/x
  3. Step 3: Cross multiply
    443.69x = 612.32 × 296.57
  4. Step 4: Simplify right side
    443.69x = 181,591.20
  5. Step 5: Solve for x
    x = 181,591.20/443.69
  6. Step 6: Final answer
    x = 409.28

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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.