Home / 638,200.45-880,716.63-351,720.54

Finding the Fourth Proportional to 638,200.45, 880,716.63 and 351,720.54

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Solution

The fourth proportional to 638,200.45, 880,716.63 and 351,720.54 is: 485,374.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,200.45 : 880,716.63 = 351,720.54 : x
  2. Step 2: Convert to fraction form
    638,200.45/880,716.63 = 351,720.54/x
  3. Step 3: Cross multiply
    638,200.45x = 880,716.63 × 351,720.54
  4. Step 4: Simplify right side
    638,200.45x = 309,766,126,931.98
  5. Step 5: Solve for x
    x = 309,766,126,931.98/638,200.45
  6. Step 6: Final answer
    x = 485,374.35

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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.