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Finding the Fourth Proportional to 435.68, 653.16 and 253.28

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Solution

The fourth proportional to 435.68, 653.16 and 253.28 is: 379.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.68 : 653.16 = 253.28 : x
  2. Step 2: Convert to fraction form
    435.68/653.16 = 253.28/x
  3. Step 3: Cross multiply
    435.68x = 653.16 × 253.28
  4. Step 4: Simplify right side
    435.68x = 165,432.36
  5. Step 5: Solve for x
    x = 165,432.36/435.68
  6. Step 6: Final answer
    x = 379.71

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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.