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Finding the Fourth Proportional to 1,285,879.76, 1,928,899.76 and 339,251.36

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Solution

The fourth proportional to 1,285,879.76, 1,928,899.76 and 339,251.36 is: 508,898.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,879.76 : 1,928,899.76 = 339,251.36 : x
  2. Step 2: Convert to fraction form
    1,285,879.76/1,928,899.76 = 339,251.36/x
  3. Step 3: Cross multiply
    1,285,879.76x = 1,928,899.76 × 339,251.36
  4. Step 4: Simplify right side
    1,285,879.76x = 654,381,866,883.67
  5. Step 5: Solve for x
    x = 654,381,866,883.67/1,285,879.76
  6. Step 6: Final answer
    x = 508,898.18

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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.