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Finding the Fourth Proportional to 487,648.62, 731,761.83 and 221,405.13

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Solution

The fourth proportional to 487,648.62, 731,761.83 and 221,405.13 is: 332,238.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,648.62 : 731,761.83 = 221,405.13 : x
  2. Step 2: Convert to fraction form
    487,648.62/731,761.83 = 221,405.13/x
  3. Step 3: Cross multiply
    487,648.62x = 731,761.83 × 221,405.13
  4. Step 4: Simplify right side
    487,648.62x = 162,015,823,100.19
  5. Step 5: Solve for x
    x = 162,015,823,100.19/487,648.62
  6. Step 6: Final answer
    x = 332,238.86

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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.