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Finding the Fourth Proportional to 479.89, 719.91 and 191.32

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Solution

The fourth proportional to 479.89, 719.91 and 191.32 is: 287.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.89 : 719.91 = 191.32 : x
  2. Step 2: Convert to fraction form
    479.89/719.91 = 191.32/x
  3. Step 3: Cross multiply
    479.89x = 719.91 × 191.32
  4. Step 4: Simplify right side
    479.89x = 137,733.18
  5. Step 5: Solve for x
    x = 137,733.18/479.89
  6. Step 6: Final answer
    x = 287.01

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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.