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Finding the Fourth Proportional to 641,833.36, 885,737 and 355,358.16

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Solution

The fourth proportional to 641,833.36, 885,737 and 355,358.16 is: 490,398.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,833.36 : 885,737 = 355,358.16 : x
  2. Step 2: Convert to fraction form
    641,833.36/885,737 = 355,358.16/x
  3. Step 3: Cross multiply
    641,833.36x = 885,737 × 355,358.16
  4. Step 4: Simplify right side
    641,833.36x = 314,753,870,563.92
  5. Step 5: Solve for x
    x = 314,753,870,563.92/641,833.36
  6. Step 6: Final answer
    x = 490,398.12

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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.