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Finding the Fourth Proportional to 1,294,986.60, 1,787,101.38 and 722,007.72

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Solution

The fourth proportional to 1,294,986.60, 1,787,101.38 and 722,007.72 is: 996,381.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,986.60 : 1,787,101.38 = 722,007.72 : x
  2. Step 2: Convert to fraction form
    1,294,986.60/1,787,101.38 = 722,007.72/x
  3. Step 3: Cross multiply
    1,294,986.60x = 1,787,101.38 × 722,007.72
  4. Step 4: Simplify right side
    1,294,986.60x = 1,290,300,992,782.65
  5. Step 5: Solve for x
    x = 1,290,300,992,782.65/1,294,986.60
  6. Step 6: Final answer
    x = 996,381.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.