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Finding the Fourth Proportional to 259,938.72, 389,020.98 and 217,866.30

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Solution

The fourth proportional to 259,938.72, 389,020.98 and 217,866.30 is: 326,055.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,938.72 : 389,020.98 = 217,866.30 : x
  2. Step 2: Convert to fraction form
    259,938.72/389,020.98 = 217,866.30/x
  3. Step 3: Cross multiply
    259,938.72x = 389,020.98 × 217,866.30
  4. Step 4: Simplify right side
    259,938.72x = 84,754,561,534.97
  5. Step 5: Solve for x
    x = 84,754,561,534.97/259,938.72
  6. Step 6: Final answer
    x = 326,055.93

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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.