Home / 1,389,071.20-2,079,459.60-827,816.80

Finding the Fourth Proportional to 1,389,071.20, 2,079,459.60 and 827,816.80

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Solution

The fourth proportional to 1,389,071.20, 2,079,459.60 and 827,816.80 is: 1,239,253.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,071.20 : 2,079,459.60 = 827,816.80 : x
  2. Step 2: Convert to fraction form
    1,389,071.20/2,079,459.60 = 827,816.80/x
  3. Step 3: Cross multiply
    1,389,071.20x = 2,079,459.60 × 827,816.80
  4. Step 4: Simplify right side
    1,389,071.20x = 1,721,411,591,801.28
  5. Step 5: Solve for x
    x = 1,721,411,591,801.28/1,389,071.20
  6. Step 6: Final answer
    x = 1,239,253.68

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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.