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Finding the Fourth Proportional to 718,916.08, 992,107.48 and 396,626

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Solution

The fourth proportional to 718,916.08, 992,107.48 and 396,626 is: 547,345.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,916.08 : 992,107.48 = 396,626 : x
  2. Step 2: Convert to fraction form
    718,916.08/992,107.48 = 396,626/x
  3. Step 3: Cross multiply
    718,916.08x = 992,107.48 × 396,626
  4. Step 4: Simplify right side
    718,916.08x = 393,495,621,362.48
  5. Step 5: Solve for x
    x = 393,495,621,362.48/718,916.08
  6. Step 6: Final answer
    x = 547,345.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.