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Finding the Fourth Proportional to 436.09, 653.28 and 253.10

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Solution

The fourth proportional to 436.09, 653.28 and 253.10 is: 379.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.09 : 653.28 = 253.10 : x
  2. Step 2: Convert to fraction form
    436.09/653.28 = 253.10/x
  3. Step 3: Cross multiply
    436.09x = 653.28 × 253.10
  4. Step 4: Simplify right side
    436.09x = 165,340.64
  5. Step 5: Solve for x
    x = 165,340.64/436.09
  6. Step 6: Final answer
    x = 379.15

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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.