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Finding the Fourth Proportional to 321,136.56, 442,651.95 and 217,737.27

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Solution

The fourth proportional to 321,136.56, 442,651.95 and 217,737.27 is: 300,127.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,136.56 : 442,651.95 = 217,737.27 : x
  2. Step 2: Convert to fraction form
    321,136.56/442,651.95 = 217,737.27/x
  3. Step 3: Cross multiply
    321,136.56x = 442,651.95 × 217,737.27
  4. Step 4: Simplify right side
    321,136.56x = 96,381,827,153.18
  5. Step 5: Solve for x
    x = 96,381,827,153.18/321,136.56
  6. Step 6: Final answer
    x = 300,127.23

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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.