Home / 920,382.32-1,380,905.70-321,431.84

Finding the Fourth Proportional to 920,382.32, 1,380,905.70 and 321,431.84

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Solution

The fourth proportional to 920,382.32, 1,380,905.70 and 321,431.84 is: 482,263.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,382.32 : 1,380,905.70 = 321,431.84 : x
  2. Step 2: Convert to fraction form
    920,382.32/1,380,905.70 = 321,431.84/x
  3. Step 3: Cross multiply
    920,382.32x = 1,380,905.70 × 321,431.84
  4. Step 4: Simplify right side
    920,382.32x = 443,867,060,017.49
  5. Step 5: Solve for x
    x = 443,867,060,017.49/920,382.32
  6. Step 6: Final answer
    x = 482,263.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.