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Finding the Fourth Proportional to 660,516.31, 991,102.52 and 261,443.49

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Solution

The fourth proportional to 660,516.31, 991,102.52 and 261,443.49 is: 392,295.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,516.31 : 991,102.52 = 261,443.49 : x
  2. Step 2: Convert to fraction form
    660,516.31/991,102.52 = 261,443.49/x
  3. Step 3: Cross multiply
    660,516.31x = 991,102.52 × 261,443.49
  4. Step 4: Simplify right side
    660,516.31x = 259,117,301,776.60
  5. Step 5: Solve for x
    x = 259,117,301,776.60/660,516.31
  6. Step 6: Final answer
    x = 392,295.08

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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.