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Finding the Fourth Proportional to 643,639.52, 888,150.48 and 357,171.68

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Solution

The fourth proportional to 643,639.52, 888,150.48 and 357,171.68 is: 492,856.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,639.52 : 888,150.48 = 357,171.68 : x
  2. Step 2: Convert to fraction form
    643,639.52/888,150.48 = 357,171.68/x
  3. Step 3: Cross multiply
    643,639.52x = 888,150.48 × 357,171.68
  4. Step 4: Simplify right side
    643,639.52x = 317,222,199,034.41
  5. Step 5: Solve for x
    x = 317,222,199,034.41/643,639.52
  6. Step 6: Final answer
    x = 492,856.93

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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.