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Finding the Fourth Proportional to 1,279,352.61, 1,764,766.47 and 826,643.61

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Solution

The fourth proportional to 1,279,352.61, 1,764,766.47 and 826,643.61 is: 1,140,289.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,352.61 : 1,764,766.47 = 826,643.61 : x
  2. Step 2: Convert to fraction form
    1,279,352.61/1,764,766.47 = 826,643.61/x
  3. Step 3: Cross multiply
    1,279,352.61x = 1,764,766.47 × 826,643.61
  4. Step 4: Simplify right side
    1,279,352.61x = 1,458,832,925,567.76
  5. Step 5: Solve for x
    x = 1,458,832,925,567.76/1,279,352.61
  6. Step 6: Final answer
    x = 1,140,289.95

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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.