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Finding the Fourth Proportional to 438,759.78, 605,488.53 and 247,785.47

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Solution

The fourth proportional to 438,759.78, 605,488.53 and 247,785.47 is: 341,943.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,759.78 : 605,488.53 = 247,785.47 : x
  2. Step 2: Convert to fraction form
    438,759.78/605,488.53 = 247,785.47/x
  3. Step 3: Cross multiply
    438,759.78x = 605,488.53 × 247,785.47
  4. Step 4: Simplify right side
    438,759.78x = 150,031,256,958.22
  5. Step 5: Solve for x
    x = 150,031,256,958.22/438,759.78
  6. Step 6: Final answer
    x = 341,943.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.