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Finding the Fourth Proportional to 289,136.80, 433,510.80 and 154,223.20

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Solution

The fourth proportional to 289,136.80, 433,510.80 and 154,223.20 is: 231,231.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,136.80 : 433,510.80 = 154,223.20 : x
  2. Step 2: Convert to fraction form
    289,136.80/433,510.80 = 154,223.20/x
  3. Step 3: Cross multiply
    289,136.80x = 433,510.80 × 154,223.20
  4. Step 4: Simplify right side
    289,136.80x = 66,857,422,810.56
  5. Step 5: Solve for x
    x = 66,857,422,810.56/289,136.80
  6. Step 6: Final answer
    x = 231,231.11

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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.