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Finding the Fourth Proportional to 487,881.28, 731,911.83 and 221,661.82

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Solution

The fourth proportional to 487,881.28, 731,911.83 and 221,661.82 is: 332,533.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,881.28 : 731,911.83 = 221,661.82 : x
  2. Step 2: Convert to fraction form
    487,881.28/731,911.83 = 221,661.82/x
  3. Step 3: Cross multiply
    487,881.28x = 731,911.83 × 221,661.82
  4. Step 4: Simplify right side
    487,881.28x = 162,236,908,317.33
  5. Step 5: Solve for x
    x = 162,236,908,317.33/487,881.28
  6. Step 6: Final answer
    x = 332,533.58

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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.