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Finding the Fourth Proportional to 261,938.80, 392,908.20 and 233,945.20

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Solution

The fourth proportional to 261,938.80, 392,908.20 and 233,945.20 is: 350,917.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,938.80 : 392,908.20 = 233,945.20 : x
  2. Step 2: Convert to fraction form
    261,938.80/392,908.20 = 233,945.20/x
  3. Step 3: Cross multiply
    261,938.80x = 392,908.20 × 233,945.20
  4. Step 4: Simplify right side
    261,938.80x = 91,918,987,430.64
  5. Step 5: Solve for x
    x = 91,918,987,430.64/261,938.80
  6. Step 6: Final answer
    x = 350,917.80

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Double scale
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Similar ratio
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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.