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Finding the Fourth Proportional to 679,952.14, 938,260.26 and 393,418.69

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Solution

The fourth proportional to 679,952.14, 938,260.26 and 393,418.69 is: 542,875.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,952.14 : 938,260.26 = 393,418.69 : x
  2. Step 2: Convert to fraction form
    679,952.14/938,260.26 = 393,418.69/x
  3. Step 3: Cross multiply
    679,952.14x = 938,260.26 × 393,418.69
  4. Step 4: Simplify right side
    679,952.14x = 369,129,120,022.61
  5. Step 5: Solve for x
    x = 369,129,120,022.61/679,952.14
  6. Step 6: Final answer
    x = 542,875.15

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Double scale
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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.