Home / 1,120,505.80-1,680,502.38-321,781

Finding the Fourth Proportional to 1,120,505.80, 1,680,502.38 and 321,781

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Solution

The fourth proportional to 1,120,505.80, 1,680,502.38 and 321,781 is: 482,597.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,505.80 : 1,680,502.38 = 321,781 : x
  2. Step 2: Convert to fraction form
    1,120,505.80/1,680,502.38 = 321,781/x
  3. Step 3: Cross multiply
    1,120,505.80x = 1,680,502.38 × 321,781
  4. Step 4: Simplify right side
    1,120,505.80x = 540,753,736,338.78
  5. Step 5: Solve for x
    x = 540,753,736,338.78/1,120,505.80
  6. Step 6: Final answer
    x = 482,597.89

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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.