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Finding the Fourth Proportional to 643,648.92, 888,277.20 and 357,169.68

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Solution

The fourth proportional to 643,648.92, 888,277.20 and 357,169.68 is: 492,917.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,648.92 : 888,277.20 = 357,169.68 : x
  2. Step 2: Convert to fraction form
    643,648.92/888,277.20 = 357,169.68/x
  3. Step 3: Cross multiply
    643,648.92x = 888,277.20 × 357,169.68
  4. Step 4: Simplify right side
    643,648.92x = 317,265,683,275.30
  5. Step 5: Solve for x
    x = 317,265,683,275.30/643,648.92
  6. Step 6: Final answer
    x = 492,917.29

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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.