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Finding the Fourth Proportional to 647,672.40, 971,994.60 and 331,966.80

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Solution

The fourth proportional to 647,672.40, 971,994.60 and 331,966.80 is: 498,199.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,672.40 : 971,994.60 = 331,966.80 : x
  2. Step 2: Convert to fraction form
    647,672.40/971,994.60 = 331,966.80/x
  3. Step 3: Cross multiply
    647,672.40x = 971,994.60 × 331,966.80
  4. Step 4: Simplify right side
    647,672.40x = 322,669,936,979.28
  5. Step 5: Solve for x
    x = 322,669,936,979.28/647,672.40
  6. Step 6: Final answer
    x = 498,199.30

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1.5x scale

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.