Home / 1,247,320.40-1,871,023.80-394,401.20

Finding the Fourth Proportional to 1,247,320.40, 1,871,023.80 and 394,401.20

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Solution

The fourth proportional to 1,247,320.40, 1,871,023.80 and 394,401.20 is: 591,615.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,320.40 : 1,871,023.80 = 394,401.20 : x
  2. Step 2: Convert to fraction form
    1,247,320.40/1,871,023.80 = 394,401.20/x
  3. Step 3: Cross multiply
    1,247,320.40x = 1,871,023.80 × 394,401.20
  4. Step 4: Simplify right side
    1,247,320.40x = 737,934,031,948.56
  5. Step 5: Solve for x
    x = 737,934,031,948.56/1,247,320.40
  6. Step 6: Final answer
    x = 591,615.46

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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.