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Finding the Fourth Proportional to 360.04, 539.91 and 128.86

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Solution

The fourth proportional to 360.04, 539.91 and 128.86 is: 193.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.04 : 539.91 = 128.86 : x
  2. Step 2: Convert to fraction form
    360.04/539.91 = 128.86/x
  3. Step 3: Cross multiply
    360.04x = 539.91 × 128.86
  4. Step 4: Simplify right side
    360.04x = 69,572.80
  5. Step 5: Solve for x
    x = 69,572.80/360.04
  6. Step 6: Final answer
    x = 193.24

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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.