Home / 1,375,428.20-2,063,142.30-428,791.40

Finding the Fourth Proportional to 1,375,428.20, 2,063,142.30 and 428,791.40

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Solution

The fourth proportional to 1,375,428.20, 2,063,142.30 and 428,791.40 is: 643,187.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,428.20 : 2,063,142.30 = 428,791.40 : x
  2. Step 2: Convert to fraction form
    1,375,428.20/2,063,142.30 = 428,791.40/x
  3. Step 3: Cross multiply
    1,375,428.20x = 2,063,142.30 × 428,791.40
  4. Step 4: Simplify right side
    1,375,428.20x = 884,657,675,216.22
  5. Step 5: Solve for x
    x = 884,657,675,216.22/1,375,428.20
  6. Step 6: Final answer
    x = 643,187.10

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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.