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Finding the Fourth Proportional to 618,611.40, 927,689.46 and 213,700.56

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Solution

The fourth proportional to 618,611.40, 927,689.46 and 213,700.56 is: 320,472.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,611.40 : 927,689.46 = 213,700.56 : x
  2. Step 2: Convert to fraction form
    618,611.40/927,689.46 = 213,700.56/x
  3. Step 3: Cross multiply
    618,611.40x = 927,689.46 × 213,700.56
  4. Step 4: Simplify right side
    618,611.40x = 198,247,757,108.10
  5. Step 5: Solve for x
    x = 198,247,757,108.10/618,611.40
  6. Step 6: Final answer
    x = 320,472.20

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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.