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Finding the Fourth Proportional to 615.08, 849.08 and 405.36

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Solution

The fourth proportional to 615.08, 849.08 and 405.36 is: 559.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.08 : 849.08 = 405.36 : x
  2. Step 2: Convert to fraction form
    615.08/849.08 = 405.36/x
  3. Step 3: Cross multiply
    615.08x = 849.08 × 405.36
  4. Step 4: Simplify right side
    615.08x = 344,184.08
  5. Step 5: Solve for x
    x = 344,184.08/615.08
  6. Step 6: Final answer
    x = 559.57

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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.