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Finding the Fourth Proportional to 289,139.80, 433,515.30 and 154,226.20

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Solution

The fourth proportional to 289,139.80, 433,515.30 and 154,226.20 is: 231,235.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,139.80 : 433,515.30 = 154,226.20 : x
  2. Step 2: Convert to fraction form
    289,139.80/433,515.30 = 154,226.20/x
  3. Step 3: Cross multiply
    289,139.80x = 433,515.30 × 154,226.20
  4. Step 4: Simplify right side
    289,139.80x = 66,859,417,360.86
  5. Step 5: Solve for x
    x = 66,859,417,360.86/289,139.80
  6. Step 6: Final answer
    x = 231,235.61

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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.