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Finding the Fourth Proportional to 479.63, 719.84 and 191.06

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Solution

The fourth proportional to 479.63, 719.84 and 191.06 is: 286.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.63 : 719.84 = 191.06 : x
  2. Step 2: Convert to fraction form
    479.63/719.84 = 191.06/x
  3. Step 3: Cross multiply
    479.63x = 719.84 × 191.06
  4. Step 4: Simplify right side
    479.63x = 137,534.91
  5. Step 5: Solve for x
    x = 137,534.91/479.63
  6. Step 6: Final answer
    x = 286.76

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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.