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Finding the Fourth Proportional to 615.90, 849.99 and 395.37

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Solution

The fourth proportional to 615.90, 849.99 and 395.37 is: 545.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.90 : 849.99 = 395.37 : x
  2. Step 2: Convert to fraction form
    615.90/849.99 = 395.37/x
  3. Step 3: Cross multiply
    615.90x = 849.99 × 395.37
  4. Step 4: Simplify right side
    615.90x = 336,060.55
  5. Step 5: Solve for x
    x = 336,060.55/615.90
  6. Step 6: Final answer
    x = 545.64

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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.