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Finding the Fourth Proportional to 261,009.54, 391,004.57 and 179,942.21

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Solution

The fourth proportional to 261,009.54, 391,004.57 and 179,942.21 is: 269,561.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,009.54 : 391,004.57 = 179,942.21 : x
  2. Step 2: Convert to fraction form
    261,009.54/391,004.57 = 179,942.21/x
  3. Step 3: Cross multiply
    261,009.54x = 391,004.57 × 179,942.21
  4. Step 4: Simplify right side
    261,009.54x = 70,358,225,394.82
  5. Step 5: Solve for x
    x = 70,358,225,394.82/261,009.54
  6. Step 6: Final answer
    x = 269,561.89

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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.