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Finding the Fourth Proportional to 542.49, 815.38 and 360.99

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Solution

The fourth proportional to 542.49, 815.38 and 360.99 is: 542.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.49 : 815.38 = 360.99 : x
  2. Step 2: Convert to fraction form
    542.49/815.38 = 360.99/x
  3. Step 3: Cross multiply
    542.49x = 815.38 × 360.99
  4. Step 4: Simplify right side
    542.49x = 294,339.05
  5. Step 5: Solve for x
    x = 294,339.05/542.49
  6. Step 6: Final answer
    x = 542.58

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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.