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Finding the Fourth Proportional to 638,079.75, 880,568.60 and 351,618.30

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Solution

The fourth proportional to 638,079.75, 880,568.60 and 351,618.30 is: 485,243.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,079.75 : 880,568.60 = 351,618.30 : x
  2. Step 2: Convert to fraction form
    638,079.75/880,568.60 = 351,618.30/x
  3. Step 3: Cross multiply
    638,079.75x = 880,568.60 × 351,618.30
  4. Step 4: Simplify right side
    638,079.75x = 309,624,032,407.29
  5. Step 5: Solve for x
    x = 309,624,032,407.29/638,079.75
  6. Step 6: Final answer
    x = 485,243.47

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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.