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Finding the Fourth Proportional to 360.99, 542.30 and 279.59

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Solution

The fourth proportional to 360.99, 542.30 and 279.59 is: 420.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.99 : 542.30 = 279.59 : x
  2. Step 2: Convert to fraction form
    360.99/542.30 = 279.59/x
  3. Step 3: Cross multiply
    360.99x = 542.30 × 279.59
  4. Step 4: Simplify right side
    360.99x = 151,617.55
  5. Step 5: Solve for x
    x = 151,617.55/360.99
  6. Step 6: Final answer
    x = 420.00

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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.