Home / 642,311.43-886,325.18-355,777.98

Finding the Fourth Proportional to 642,311.43, 886,325.18 and 355,777.98

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Solution

The fourth proportional to 642,311.43, 886,325.18 and 355,777.98 is: 490,937.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,311.43 : 886,325.18 = 355,777.98 : x
  2. Step 2: Convert to fraction form
    642,311.43/886,325.18 = 355,777.98/x
  3. Step 3: Cross multiply
    642,311.43x = 886,325.18 × 355,777.98
  4. Step 4: Simplify right side
    642,311.43x = 315,334,982,163.54
  5. Step 5: Solve for x
    x = 315,334,982,163.54/642,311.43
  6. Step 6: Final answer
    x = 490,937.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.