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Finding the Fourth Proportional to 438,913.78, 605,701.06 and 237,709.78

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Solution

The fourth proportional to 438,913.78, 605,701.06 and 237,709.78 is: 328,039.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,913.78 : 605,701.06 = 237,709.78 : x
  2. Step 2: Convert to fraction form
    438,913.78/605,701.06 = 237,709.78/x
  3. Step 3: Cross multiply
    438,913.78x = 605,701.06 × 237,709.78
  4. Step 4: Simplify right side
    438,913.78x = 143,981,065,718.37
  5. Step 5: Solve for x
    x = 143,981,065,718.37/438,913.78
  6. Step 6: Final answer
    x = 328,039.52

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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.