Home / 641,788.84-963,167.48-438,900.16

Finding the Fourth Proportional to 641,788.84, 963,167.48 and 438,900.16

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Solution

The fourth proportional to 641,788.84, 963,167.48 and 438,900.16 is: 658,681.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,788.84 : 963,167.48 = 438,900.16 : x
  2. Step 2: Convert to fraction form
    641,788.84/963,167.48 = 438,900.16/x
  3. Step 3: Cross multiply
    641,788.84x = 963,167.48 × 438,900.16
  4. Step 4: Simplify right side
    641,788.84x = 422,734,361,078.80
  5. Step 5: Solve for x
    x = 422,734,361,078.80/641,788.84
  6. Step 6: Final answer
    x = 658,681.38

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.