Home / 1,138,426.40-1,707,639.60-428,613.68

Finding the Fourth Proportional to 1,138,426.40, 1,707,639.60 and 428,613.68

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Solution

The fourth proportional to 1,138,426.40, 1,707,639.60 and 428,613.68 is: 642,920.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,426.40 : 1,707,639.60 = 428,613.68 : x
  2. Step 2: Convert to fraction form
    1,138,426.40/1,707,639.60 = 428,613.68/x
  3. Step 3: Cross multiply
    1,138,426.40x = 1,707,639.60 × 428,613.68
  4. Step 4: Simplify right side
    1,138,426.40x = 731,917,693,069.73
  5. Step 5: Solve for x
    x = 731,917,693,069.73/1,138,426.40
  6. Step 6: Final answer
    x = 642,920.52

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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.