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Finding the Fourth Proportional to 1,296,019.20, 1,944,028.80 and 1,028,330.40

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Solution

The fourth proportional to 1,296,019.20, 1,944,028.80 and 1,028,330.40 is: 1,542,495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,019.20 : 1,944,028.80 = 1,028,330.40 : x
  2. Step 2: Convert to fraction form
    1,296,019.20/1,944,028.80 = 1,028,330.40/x
  3. Step 3: Cross multiply
    1,296,019.20x = 1,944,028.80 × 1,028,330.40
  4. Step 4: Simplify right side
    1,296,019.20x = 1,999,103,913,515.52
  5. Step 5: Solve for x
    x = 1,999,103,913,515.52/1,296,019.20
  6. Step 6: Final answer
    x = 1,542,495.60

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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.