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Finding the Fourth Proportional to 626,871.20, 865,451.44 and 381,948.32

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Solution

The fourth proportional to 626,871.20, 865,451.44 and 381,948.32 is: 527,313.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,871.20 : 865,451.44 = 381,948.32 : x
  2. Step 2: Convert to fraction form
    626,871.20/865,451.44 = 381,948.32/x
  3. Step 3: Cross multiply
    626,871.20x = 865,451.44 × 381,948.32
  4. Step 4: Simplify right side
    626,871.20x = 330,557,723,549.58
  5. Step 5: Solve for x
    x = 330,557,723,549.58/626,871.20
  6. Step 6: Final answer
    x = 527,313.62

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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.