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Finding the Fourth Proportional to 647,359.80, 971,331.30 and 310,270.20

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Solution

The fourth proportional to 647,359.80, 971,331.30 and 310,270.20 is: 465,545.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,359.80 : 971,331.30 = 310,270.20 : x
  2. Step 2: Convert to fraction form
    647,359.80/971,331.30 = 310,270.20/x
  3. Step 3: Cross multiply
    647,359.80x = 971,331.30 × 310,270.20
  4. Step 4: Simplify right side
    647,359.80x = 301,375,156,717.26
  5. Step 5: Solve for x
    x = 301,375,156,717.26/647,359.80
  6. Step 6: Final answer
    x = 465,545.06

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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.