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Finding the Fourth Proportional to 399,458.57, 551,264.77 and 218,179.05

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Solution

The fourth proportional to 399,458.57, 551,264.77 and 218,179.05 is: 301,093.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,458.57 : 551,264.77 = 218,179.05 : x
  2. Step 2: Convert to fraction form
    399,458.57/551,264.77 = 218,179.05/x
  3. Step 3: Cross multiply
    399,458.57x = 551,264.77 × 218,179.05
  4. Step 4: Simplify right side
    399,458.57x = 120,274,425,123.41
  5. Step 5: Solve for x
    x = 120,274,425,123.41/399,458.57
  6. Step 6: Final answer
    x = 301,093.62

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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.