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Finding the Fourth Proportional to 638,379.12, 880,963 and 351,903.99

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Solution

The fourth proportional to 638,379.12, 880,963 and 351,903.99 is: 485,627.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,379.12 : 880,963 = 351,903.99 : x
  2. Step 2: Convert to fraction form
    638,379.12/880,963 = 351,903.99/x
  3. Step 3: Cross multiply
    638,379.12x = 880,963 × 351,903.99
  4. Step 4: Simplify right side
    638,379.12x = 310,014,394,742.37
  5. Step 5: Solve for x
    x = 310,014,394,742.37/638,379.12
  6. Step 6: Final answer
    x = 485,627.40

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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.