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Finding the Fourth Proportional to 438,617.61, 605,388.21 and 277,687.20

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Solution

The fourth proportional to 438,617.61, 605,388.21 and 277,687.20 is: 383,269.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,617.61 : 605,388.21 = 277,687.20 : x
  2. Step 2: Convert to fraction form
    438,617.61/605,388.21 = 277,687.20/x
  3. Step 3: Cross multiply
    438,617.61x = 605,388.21 × 277,687.20
  4. Step 4: Simplify right side
    438,617.61x = 168,108,556,947.91
  5. Step 5: Solve for x
    x = 168,108,556,947.91/438,617.61
  6. Step 6: Final answer
    x = 383,269.06

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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.