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Finding the Fourth Proportional to 638,257.80, 880,801.13 and 351,778.62

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Solution

The fourth proportional to 638,257.80, 880,801.13 and 351,778.62 is: 485,457.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,257.80 : 880,801.13 = 351,778.62 : x
  2. Step 2: Convert to fraction form
    638,257.80/880,801.13 = 351,778.62/x
  3. Step 3: Cross multiply
    638,257.80x = 880,801.13 × 351,778.62
  4. Step 4: Simplify right side
    638,257.80x = 309,847,004,246.95
  5. Step 5: Solve for x
    x = 309,847,004,246.95/638,257.80
  6. Step 6: Final answer
    x = 485,457.45

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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.