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Finding the Fourth Proportional to 261,412.65, 392,040.45 and 92,910.83

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Solution

The fourth proportional to 261,412.65, 392,040.45 and 92,910.83 is: 139,338.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,412.65 : 392,040.45 = 92,910.83 : x
  2. Step 2: Convert to fraction form
    261,412.65/392,040.45 = 92,910.83/x
  3. Step 3: Cross multiply
    261,412.65x = 392,040.45 × 92,910.83
  4. Step 4: Simplify right side
    261,412.65x = 36,424,801,642.87
  5. Step 5: Solve for x
    x = 36,424,801,642.87/261,412.65
  6. Step 6: Final answer
    x = 139,338.33

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1.5x scale

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.