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Finding the Fourth Proportional to 768,680.40, 1,149,910.20 and 675,368.40

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Solution

The fourth proportional to 768,680.40, 1,149,910.20 and 675,368.40 is: 1,010,319.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,680.40 : 1,149,910.20 = 675,368.40 : x
  2. Step 2: Convert to fraction form
    768,680.40/1,149,910.20 = 675,368.40/x
  3. Step 3: Cross multiply
    768,680.40x = 1,149,910.20 × 675,368.40
  4. Step 4: Simplify right side
    768,680.40x = 776,613,011,917.68
  5. Step 5: Solve for x
    x = 776,613,011,917.68/768,680.40
  6. Step 6: Final answer
    x = 1,010,319.78

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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.