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Finding the Fourth Proportional to 479.81, 719.80 and 155.12

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Solution

The fourth proportional to 479.81, 719.80 and 155.12 is: 232.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.81 : 719.80 = 155.12 : x
  2. Step 2: Convert to fraction form
    479.81/719.80 = 155.12/x
  3. Step 3: Cross multiply
    479.81x = 719.80 × 155.12
  4. Step 4: Simplify right side
    479.81x = 111,651.39
  5. Step 5: Solve for x
    x = 111,651.39/479.81
  6. Step 6: Final answer
    x = 232.70

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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.