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Finding the Fourth Proportional to 480.30, 719.76 and 191.40

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Solution

The fourth proportional to 480.30, 719.76 and 191.40 is: 286.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.30 : 719.76 = 191.40 : x
  2. Step 2: Convert to fraction form
    480.30/719.76 = 191.40/x
  3. Step 3: Cross multiply
    480.30x = 719.76 × 191.40
  4. Step 4: Simplify right side
    480.30x = 137,760.08
  5. Step 5: Solve for x
    x = 137,760.08/480.30
  6. Step 6: Final answer
    x = 286.82

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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.