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Finding the Fourth Proportional to 645,062.40, 966,787.20 and 329,644.80

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Solution

The fourth proportional to 645,062.40, 966,787.20 and 329,644.80 is: 494,055.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,062.40 : 966,787.20 = 329,644.80 : x
  2. Step 2: Convert to fraction form
    645,062.40/966,787.20 = 329,644.80/x
  3. Step 3: Cross multiply
    645,062.40x = 966,787.20 × 329,644.80
  4. Step 4: Simplify right side
    645,062.40x = 318,696,373,186.56
  5. Step 5: Solve for x
    x = 318,696,373,186.56/645,062.40
  6. Step 6: Final answer
    x = 494,055.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.