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Finding the Fourth Proportional to 643,549.92, 888,228 and 371,662.08

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Solution

The fourth proportional to 643,549.92, 888,228 and 371,662.08 is: 512,968.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,549.92 : 888,228 = 371,662.08 : x
  2. Step 2: Convert to fraction form
    643,549.92/888,228 = 371,662.08/x
  3. Step 3: Cross multiply
    643,549.92x = 888,228 × 371,662.08
  4. Step 4: Simplify right side
    643,549.92x = 330,120,665,994.24
  5. Step 5: Solve for x
    x = 330,120,665,994.24/643,549.92
  6. Step 6: Final answer
    x = 512,968.23

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1.5x scale

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.