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Finding the Fourth Proportional to 1,039,766.80, 1,557,025.80 and 682,848.40

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Solution

The fourth proportional to 1,039,766.80, 1,557,025.80 and 682,848.40 is: 1,022,549.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039,766.80 : 1,557,025.80 = 682,848.40 : x
  2. Step 2: Convert to fraction form
    1,039,766.80/1,557,025.80 = 682,848.40/x
  3. Step 3: Cross multiply
    1,039,766.80x = 1,557,025.80 × 682,848.40
  4. Step 4: Simplify right side
    1,039,766.80x = 1,063,212,576,288.72
  5. Step 5: Solve for x
    x = 1,063,212,576,288.72/1,039,766.80
  6. Step 6: Final answer
    x = 1,022,549.07

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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.