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Finding the Fourth Proportional to 642,249.98, 886,267.05 and 351,803.78

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Solution

The fourth proportional to 642,249.98, 886,267.05 and 351,803.78 is: 485,468.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,249.98 : 886,267.05 = 351,803.78 : x
  2. Step 2: Convert to fraction form
    642,249.98/886,267.05 = 351,803.78/x
  3. Step 3: Cross multiply
    642,249.98x = 886,267.05 × 351,803.78
  4. Step 4: Simplify right side
    642,249.98x = 311,792,098,279.45
  5. Step 5: Solve for x
    x = 311,792,098,279.45/642,249.98
  6. Step 6: Final answer
    x = 485,468.44

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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.