Home / 687,600.80-1,031,401.20-628,503.20

Finding the Fourth Proportional to 687,600.80, 1,031,401.20 and 628,503.20

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Solution

The fourth proportional to 687,600.80, 1,031,401.20 and 628,503.20 is: 942,754.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,600.80 : 1,031,401.20 = 628,503.20 : x
  2. Step 2: Convert to fraction form
    687,600.80/1,031,401.20 = 628,503.20/x
  3. Step 3: Cross multiply
    687,600.80x = 1,031,401.20 × 628,503.20
  4. Step 4: Simplify right side
    687,600.80x = 648,238,954,683.84
  5. Step 5: Solve for x
    x = 648,238,954,683.84/687,600.80
  6. Step 6: Final answer
    x = 942,754.80

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1.5x scale

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.