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Finding the Fourth Proportional to 311,987,673.80, 467,981,510.70 and 221,288,409.80

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Solution

The fourth proportional to 311,987,673.80, 467,981,510.70 and 221,288,409.80 is: 331,932,614.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,987,673.80 : 467,981,510.70 = 221,288,409.80 : x
  2. Step 2: Convert to fraction form
    311,987,673.80/467,981,510.70 = 221,288,409.80/x
  3. Step 3: Cross multiply
    311,987,673.80x = 467,981,510.70 × 221,288,409.80
  4. Step 4: Simplify right side
    311,987,673.80x = 103,558,884,318,604,688
  5. Step 5: Solve for x
    x = 103,558,884,318,604,688/311,987,673.80
  6. Step 6: Final answer
    x = 331,932,614.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.