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Finding the Fourth Proportional to 479.88, 719.87 and 155.16

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Solution

The fourth proportional to 479.88, 719.87 and 155.16 is: 232.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.88 : 719.87 = 155.16 : x
  2. Step 2: Convert to fraction form
    479.88/719.87 = 155.16/x
  3. Step 3: Cross multiply
    479.88x = 719.87 × 155.16
  4. Step 4: Simplify right side
    479.88x = 111,694.25
  5. Step 5: Solve for x
    x = 111,694.25/479.88
  6. Step 6: Final answer
    x = 232.75

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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.