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Finding the Fourth Proportional to 479.68, 719.76 and 191.32

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Solution

The fourth proportional to 479.68, 719.76 and 191.32 is: 287.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.68 : 719.76 = 191.32 : x
  2. Step 2: Convert to fraction form
    479.68/719.76 = 191.32/x
  3. Step 3: Cross multiply
    479.68x = 719.76 × 191.32
  4. Step 4: Simplify right side
    479.68x = 137,704.48
  5. Step 5: Solve for x
    x = 137,704.48/479.68
  6. Step 6: Final answer
    x = 287.08

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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.