Home / 1,120,504.80-1,680,500.88-321,780

Finding the Fourth Proportional to 1,120,504.80, 1,680,500.88 and 321,780

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Solution

The fourth proportional to 1,120,504.80, 1,680,500.88 and 321,780 is: 482,596.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,504.80 : 1,680,500.88 = 321,780 : x
  2. Step 2: Convert to fraction form
    1,120,504.80/1,680,500.88 = 321,780/x
  3. Step 3: Cross multiply
    1,120,504.80x = 1,680,500.88 × 321,780
  4. Step 4: Simplify right side
    1,120,504.80x = 540,751,573,166.40
  5. Step 5: Solve for x
    x = 540,751,573,166.40/1,120,504.80
  6. Step 6: Final answer
    x = 482,596.39

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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.