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Finding the Fourth Proportional to 923.12, 1,384.88 and 273.90

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Solution

The fourth proportional to 923.12, 1,384.88 and 273.90 is: 410.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.12 : 1,384.88 = 273.90 : x
  2. Step 2: Convert to fraction form
    923.12/1,384.88 = 273.90/x
  3. Step 3: Cross multiply
    923.12x = 1,384.88 × 273.90
  4. Step 4: Simplify right side
    923.12x = 379,318.63
  5. Step 5: Solve for x
    x = 379,318.63/923.12
  6. Step 6: Final answer
    x = 410.91

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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.