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Finding the Fourth Proportional to 443,155.91, 611,837.97 and 361,678.79

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Solution

The fourth proportional to 443,155.91, 611,837.97 and 361,678.79 is: 499,347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,155.91 : 611,837.97 = 361,678.79 : x
  2. Step 2: Convert to fraction form
    443,155.91/611,837.97 = 361,678.79/x
  3. Step 3: Cross multiply
    443,155.91x = 611,837.97 × 361,678.79
  4. Step 4: Simplify right side
    443,155.91x = 221,288,816,838.96
  5. Step 5: Solve for x
    x = 221,288,816,838.96/443,155.91
  6. Step 6: Final answer
    x = 499,347.55

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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.