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Finding the Fourth Proportional to 1,243,815.91, 1,865,717.73 and 485,734.39

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Solution

The fourth proportional to 1,243,815.91, 1,865,717.73 and 485,734.39 is: 728,599.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,815.91 : 1,865,717.73 = 485,734.39 : x
  2. Step 2: Convert to fraction form
    1,243,815.91/1,865,717.73 = 485,734.39/x
  3. Step 3: Cross multiply
    1,243,815.91x = 1,865,717.73 × 485,734.39
  4. Step 4: Simplify right side
    1,243,815.91x = 906,243,258,829.44
  5. Step 5: Solve for x
    x = 906,243,258,829.44/1,243,815.91
  6. Step 6: Final answer
    x = 728,599.19

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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.