Home / 1,538,792.40-2,309,500.80-687,174.60

Finding the Fourth Proportional to 1,538,792.40, 2,309,500.80 and 687,174.60

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Solution

The fourth proportional to 1,538,792.40, 2,309,500.80 and 687,174.60 is: 1,031,347.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538,792.40 : 2,309,500.80 = 687,174.60 : x
  2. Step 2: Convert to fraction form
    1,538,792.40/2,309,500.80 = 687,174.60/x
  3. Step 3: Cross multiply
    1,538,792.40x = 2,309,500.80 × 687,174.60
  4. Step 4: Simplify right side
    1,538,792.40x = 1,587,030,288,439.68
  5. Step 5: Solve for x
    x = 1,587,030,288,439.68/1,538,792.40
  6. Step 6: Final answer
    x = 1,031,347.89

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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.