Home / 638,280.12-880,830.66-351,800.22

Finding the Fourth Proportional to 638,280.12, 880,830.66 and 351,800.22

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Solution

The fourth proportional to 638,280.12, 880,830.66 and 351,800.22 is: 485,486.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,280.12 : 880,830.66 = 351,800.22 : x
  2. Step 2: Convert to fraction form
    638,280.12/880,830.66 = 351,800.22/x
  3. Step 3: Cross multiply
    638,280.12x = 880,830.66 × 351,800.22
  4. Step 4: Simplify right side
    638,280.12x = 309,876,419,970.75
  5. Step 5: Solve for x
    x = 309,876,419,970.75/638,280.12
  6. Step 6: Final answer
    x = 485,486.56

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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.