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Finding the Fourth Proportional to 615.96, 925.28 and 443.16

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Solution

The fourth proportional to 615.96, 925.28 and 443.16 is: 665.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.96 : 925.28 = 443.16 : x
  2. Step 2: Convert to fraction form
    615.96/925.28 = 443.16/x
  3. Step 3: Cross multiply
    615.96x = 925.28 × 443.16
  4. Step 4: Simplify right side
    615.96x = 410,047.08
  5. Step 5: Solve for x
    x = 410,047.08/615.96
  6. Step 6: Final answer
    x = 665.70

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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.