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Finding the Fourth Proportional to 436.08, 657.36 and 408.24

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Solution

The fourth proportional to 436.08, 657.36 and 408.24 is: 615.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.08 : 657.36 = 408.24 : x
  2. Step 2: Convert to fraction form
    436.08/657.36 = 408.24/x
  3. Step 3: Cross multiply
    436.08x = 657.36 × 408.24
  4. Step 4: Simplify right side
    436.08x = 268,360.65
  5. Step 5: Solve for x
    x = 268,360.65/436.08
  6. Step 6: Final answer
    x = 615.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.