Home / 2,815,275.20-4,222,912.80-685,342.40

Finding the Fourth Proportional to 2,815,275.20, 4,222,912.80 and 685,342.40

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Solution

The fourth proportional to 2,815,275.20, 4,222,912.80 and 685,342.40 is: 1,028,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815,275.20 : 4,222,912.80 = 685,342.40 : x
  2. Step 2: Convert to fraction form
    2,815,275.20/4,222,912.80 = 685,342.40/x
  3. Step 3: Cross multiply
    2,815,275.20x = 4,222,912.80 × 685,342.40
  4. Step 4: Simplify right side
    2,815,275.20x = 2,894,141,193,342.72
  5. Step 5: Solve for x
    x = 2,894,141,193,342.72/2,815,275.20
  6. Step 6: Final answer
    x = 1,028,013.60

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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.