Home / 1,247,660.80-1,871,491.20-687,788.80

Finding the Fourth Proportional to 1,247,660.80, 1,871,491.20 and 687,788.80

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Solution

The fourth proportional to 1,247,660.80, 1,871,491.20 and 687,788.80 is: 1,031,683.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,660.80 : 1,871,491.20 = 687,788.80 : x
  2. Step 2: Convert to fraction form
    1,247,660.80/1,871,491.20 = 687,788.80/x
  3. Step 3: Cross multiply
    1,247,660.80x = 1,871,491.20 × 687,788.80
  4. Step 4: Simplify right side
    1,247,660.80x = 1,287,190,686,658.56
  5. Step 5: Solve for x
    x = 1,287,190,686,658.56/1,247,660.80
  6. Step 6: Final answer
    x = 1,031,683.20

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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.