Home / 687,747.80-1,031,621.70-628,650.20

Finding the Fourth Proportional to 687,747.80, 1,031,621.70 and 628,650.20

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Solution

The fourth proportional to 687,747.80, 1,031,621.70 and 628,650.20 is: 942,975.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,747.80 : 1,031,621.70 = 628,650.20 : x
  2. Step 2: Convert to fraction form
    687,747.80/1,031,621.70 = 628,650.20/x
  3. Step 3: Cross multiply
    687,747.80x = 1,031,621.70 × 628,650.20
  4. Step 4: Simplify right side
    687,747.80x = 648,529,188,029.34
  5. Step 5: Solve for x
    x = 648,529,188,029.34/687,747.80
  6. Step 6: Final answer
    x = 942,975.30

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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.