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Finding the Fourth Proportional to 479.68, 719.66 and 191.16

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Solution

The fourth proportional to 479.68, 719.66 and 191.16 is: 286.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.68 : 719.66 = 191.16 : x
  2. Step 2: Convert to fraction form
    479.68/719.66 = 191.16/x
  3. Step 3: Cross multiply
    479.68x = 719.66 × 191.16
  4. Step 4: Simplify right side
    479.68x = 137,570.21
  5. Step 5: Solve for x
    x = 137,570.21/479.68
  6. Step 6: Final answer
    x = 286.80

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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.