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Finding the Fourth Proportional to 643,982.64, 888,797.88 and 615,631.92

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Solution

The fourth proportional to 643,982.64, 888,797.88 and 615,631.92 is: 849,669.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,982.64 : 888,797.88 = 615,631.92 : x
  2. Step 2: Convert to fraction form
    643,982.64/888,797.88 = 615,631.92/x
  3. Step 3: Cross multiply
    643,982.64x = 888,797.88 × 615,631.92
  4. Step 4: Simplify right side
    643,982.64x = 547,172,345,356.33
  5. Step 5: Solve for x
    x = 547,172,345,356.33/643,982.64
  6. Step 6: Final answer
    x = 849,669.40

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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.