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Finding the Fourth Proportional to 399,551.70, 551,393.20 and 218,266.64

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Solution

The fourth proportional to 399,551.70, 551,393.20 and 218,266.64 is: 301,214.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,551.70 : 551,393.20 = 218,266.64 : x
  2. Step 2: Convert to fraction form
    399,551.70/551,393.20 = 218,266.64/x
  3. Step 3: Cross multiply
    399,551.70x = 551,393.20 × 218,266.64
  4. Step 4: Simplify right side
    399,551.70x = 120,350,741,082.85
  5. Step 5: Solve for x
    x = 120,350,741,082.85/399,551.70
  6. Step 6: Final answer
    x = 301,214.44

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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.