Home / 2,100,459.20-3,150,688.80-978,641.60

Finding the Fourth Proportional to 2,100,459.20, 3,150,688.80 and 978,641.60

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Solution

The fourth proportional to 2,100,459.20, 3,150,688.80 and 978,641.60 is: 1,467,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100,459.20 : 3,150,688.80 = 978,641.60 : x
  2. Step 2: Convert to fraction form
    2,100,459.20/3,150,688.80 = 978,641.60/x
  3. Step 3: Cross multiply
    2,100,459.20x = 3,150,688.80 × 978,641.60
  4. Step 4: Simplify right side
    2,100,459.20x = 3,083,395,128,334.08
  5. Step 5: Solve for x
    x = 3,083,395,128,334.08/2,100,459.20
  6. Step 6: Final answer
    x = 1,467,962.40

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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.