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Finding the Fourth Proportional to 479.76, 719.70 and 191.13

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Solution

The fourth proportional to 479.76, 719.70 and 191.13 is: 286.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.76 : 719.70 = 191.13 : x
  2. Step 2: Convert to fraction form
    479.76/719.70 = 191.13/x
  3. Step 3: Cross multiply
    479.76x = 719.70 × 191.13
  4. Step 4: Simplify right side
    479.76x = 137,556.26
  5. Step 5: Solve for x
    x = 137,556.26/479.76
  6. Step 6: Final answer
    x = 286.72

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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.