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Finding the Fourth Proportional to 289,255.80, 399,161.34 and 168,400.56

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Solution

The fourth proportional to 289,255.80, 399,161.34 and 168,400.56 is: 232,385.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,255.80 : 399,161.34 = 168,400.56 : x
  2. Step 2: Convert to fraction form
    289,255.80/399,161.34 = 168,400.56/x
  3. Step 3: Cross multiply
    289,255.80x = 399,161.34 × 168,400.56
  4. Step 4: Simplify right side
    289,255.80x = 67,218,993,186.35
  5. Step 5: Solve for x
    x = 67,218,993,186.35/289,255.80
  6. Step 6: Final answer
    x = 232,385.98

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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.