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Finding the Fourth Proportional to 487.06, 733.48 and 438.87

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Solution

The fourth proportional to 487.06, 733.48 and 438.87 is: 660.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.06 : 733.48 = 438.87 : x
  2. Step 2: Convert to fraction form
    487.06/733.48 = 438.87/x
  3. Step 3: Cross multiply
    487.06x = 733.48 × 438.87
  4. Step 4: Simplify right side
    487.06x = 321,902.37
  5. Step 5: Solve for x
    x = 321,902.37/487.06
  6. Step 6: Final answer
    x = 660.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.