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Finding the Fourth Proportional to 660,046.79, 990,061.82 and 210,761.97

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Solution

The fourth proportional to 660,046.79, 990,061.82 and 210,761.97 is: 316,140.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,046.79 : 990,061.82 = 210,761.97 : x
  2. Step 2: Convert to fraction form
    660,046.79/990,061.82 = 210,761.97/x
  3. Step 3: Cross multiply
    660,046.79x = 990,061.82 × 210,761.97
  4. Step 4: Simplify right side
    660,046.79x = 208,667,375,628.80
  5. Step 5: Solve for x
    x = 208,667,375,628.80/660,046.79
  6. Step 6: Final answer
    x = 316,140.28

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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.