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Finding the Fourth Proportional to 621,878.39, 858,182.12 and 349,946.13

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Solution

The fourth proportional to 621,878.39, 858,182.12 and 349,946.13 is: 482,920.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,878.39 : 858,182.12 = 349,946.13 : x
  2. Step 2: Convert to fraction form
    621,878.39/858,182.12 = 349,946.13/x
  3. Step 3: Cross multiply
    621,878.39x = 858,182.12 × 349,946.13
  4. Step 4: Simplify right side
    621,878.39x = 300,317,511,729.20
  5. Step 5: Solve for x
    x = 300,317,511,729.20/621,878.39
  6. Step 6: Final answer
    x = 482,920.00

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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.