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Finding the Fourth Proportional to 399,651.17, 551,289.85 and 256,249.58

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Solution

The fourth proportional to 399,651.17, 551,289.85 and 256,249.58 is: 353,477.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,651.17 : 551,289.85 = 256,249.58 : x
  2. Step 2: Convert to fraction form
    399,651.17/551,289.85 = 256,249.58/x
  3. Step 3: Cross multiply
    399,651.17x = 551,289.85 × 256,249.58
  4. Step 4: Simplify right side
    399,651.17x = 141,267,789,123.69
  5. Step 5: Solve for x
    x = 141,267,789,123.69/399,651.17
  6. Step 6: Final answer
    x = 353,477.74

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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.