Home / 1,425,877.20-2,138,621.40-428,605.20

Finding the Fourth Proportional to 1,425,877.20, 2,138,621.40 and 428,605.20

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Solution

The fourth proportional to 1,425,877.20, 2,138,621.40 and 428,605.20 is: 642,849.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,877.20 : 2,138,621.40 = 428,605.20 : x
  2. Step 2: Convert to fraction form
    1,425,877.20/2,138,621.40 = 428,605.20/x
  3. Step 3: Cross multiply
    1,425,877.20x = 2,138,621.40 × 428,605.20
  4. Step 4: Simplify right side
    1,425,877.20x = 916,624,252,871.28
  5. Step 5: Solve for x
    x = 916,624,252,871.28/1,425,877.20
  6. Step 6: Final answer
    x = 642,849.37

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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.