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Finding the Fourth Proportional to 643,731.64, 888,144.16 and 371,763.64

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Solution

The fourth proportional to 643,731.64, 888,144.16 and 371,763.64 is: 512,915.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,731.64 : 888,144.16 = 371,763.64 : x
  2. Step 2: Convert to fraction form
    643,731.64/888,144.16 = 371,763.64/x
  3. Step 3: Cross multiply
    643,731.64x = 888,144.16 × 371,763.64
  4. Step 4: Simplify right side
    643,731.64x = 330,179,705,766.34
  5. Step 5: Solve for x
    x = 330,179,705,766.34/643,731.64
  6. Step 6: Final answer
    x = 512,915.14

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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.