Home / 1,120,439.52-1,680,428.72-321,543

Finding the Fourth Proportional to 1,120,439.52, 1,680,428.72 and 321,543

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Solution

The fourth proportional to 1,120,439.52, 1,680,428.72 and 321,543 is: 482,248.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,439.52 : 1,680,428.72 = 321,543 : x
  2. Step 2: Convert to fraction form
    1,120,439.52/1,680,428.72 = 321,543/x
  3. Step 3: Cross multiply
    1,120,439.52x = 1,680,428.72 × 321,543
  4. Step 4: Simplify right side
    1,120,439.52x = 540,330,091,914.96
  5. Step 5: Solve for x
    x = 540,330,091,914.96/1,120,439.52
  6. Step 6: Final answer
    x = 482,248.33

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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.