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Finding the Fourth Proportional to 479.59, 718.89 and 186.90

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Solution

The fourth proportional to 479.59, 718.89 and 186.90 is: 280.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.59 : 718.89 = 186.90 : x
  2. Step 2: Convert to fraction form
    479.59/718.89 = 186.90/x
  3. Step 3: Cross multiply
    479.59x = 718.89 × 186.90
  4. Step 4: Simplify right side
    479.59x = 134,363.94
  5. Step 5: Solve for x
    x = 134,363.94/479.59
  6. Step 6: Final answer
    x = 280.17

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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.