Home / 638,375.12-880,963.72-351,905.46

Finding the Fourth Proportional to 638,375.12, 880,963.72 and 351,905.46

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Solution

The fourth proportional to 638,375.12, 880,963.72 and 351,905.46 is: 485,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,375.12 : 880,963.72 = 351,905.46 : x
  2. Step 2: Convert to fraction form
    638,375.12/880,963.72 = 351,905.46/x
  3. Step 3: Cross multiply
    638,375.12x = 880,963.72 × 351,905.46
  4. Step 4: Simplify right side
    638,375.12x = 310,015,943,129.91
  5. Step 5: Solve for x
    x = 310,015,943,129.91/638,375.12
  6. Step 6: Final answer
    x = 485,632.87

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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.