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Finding the Fourth Proportional to 638,257.55, 880,800.78 and 351,778.37

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Solution

The fourth proportional to 638,257.55, 880,800.78 and 351,778.37 is: 485,457.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,257.55 : 880,800.78 = 351,778.37 : x
  2. Step 2: Convert to fraction form
    638,257.55/880,800.78 = 351,778.37/x
  3. Step 3: Cross multiply
    638,257.55x = 880,800.78 × 351,778.37
  4. Step 4: Simplify right side
    638,257.55x = 309,846,662,683.13
  5. Step 5: Solve for x
    x = 309,846,662,683.13/638,257.55
  6. Step 6: Final answer
    x = 485,457.11

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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.