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Finding the Fourth Proportional to 661,190.55, 991,204.41 and 262,111.65

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Solution

The fourth proportional to 661,190.55, 991,204.41 and 262,111.65 is: 392,936.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,190.55 : 991,204.41 = 262,111.65 : x
  2. Step 2: Convert to fraction form
    661,190.55/991,204.41 = 262,111.65/x
  3. Step 3: Cross multiply
    661,190.55x = 991,204.41 × 262,111.65
  4. Step 4: Simplify right side
    661,190.55x = 259,806,223,392.38
  5. Step 5: Solve for x
    x = 259,806,223,392.38/661,190.55
  6. Step 6: Final answer
    x = 392,936.99

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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.