Home / 2,661,122.60-3,990,809.10-978,007.40

Finding the Fourth Proportional to 2,661,122.60, 3,990,809.10 and 978,007.40

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Solution

The fourth proportional to 2,661,122.60, 3,990,809.10 and 978,007.40 is: 1,466,689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661,122.60 : 3,990,809.10 = 978,007.40 : x
  2. Step 2: Convert to fraction form
    2,661,122.60/3,990,809.10 = 978,007.40/x
  3. Step 3: Cross multiply
    2,661,122.60x = 3,990,809.10 × 978,007.40
  4. Step 4: Simplify right side
    2,661,122.60x = 3,903,040,831,787.34
  5. Step 5: Solve for x
    x = 3,903,040,831,787.34/2,661,122.60
  6. Step 6: Final answer
    x = 1,466,689.60

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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.