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Finding the Fourth Proportional to 647,908.80, 971,863.20 and 310,892.10

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Solution

The fourth proportional to 647,908.80, 971,863.20 and 310,892.10 is: 466,338.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,908.80 : 971,863.20 = 310,892.10 : x
  2. Step 2: Convert to fraction form
    647,908.80/971,863.20 = 310,892.10/x
  3. Step 3: Cross multiply
    647,908.80x = 971,863.20 × 310,892.10
  4. Step 4: Simplify right side
    647,908.80x = 302,144,591,160.72
  5. Step 5: Solve for x
    x = 302,144,591,160.72/647,908.80
  6. Step 6: Final answer
    x = 466,338.15

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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.