Home / 1,425,872.70-2,138,614.65-428,600.70

Finding the Fourth Proportional to 1,425,872.70, 2,138,614.65 and 428,600.70

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Solution

The fourth proportional to 1,425,872.70, 2,138,614.65 and 428,600.70 is: 642,842.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,872.70 : 2,138,614.65 = 428,600.70 : x
  2. Step 2: Convert to fraction form
    1,425,872.70/2,138,614.65 = 428,600.70/x
  3. Step 3: Cross multiply
    1,425,872.70x = 2,138,614.65 × 428,600.70
  4. Step 4: Simplify right side
    1,425,872.70x = 916,611,736,020.26
  5. Step 5: Solve for x
    x = 916,611,736,020.26/1,425,872.70
  6. Step 6: Final answer
    x = 642,842.62

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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.