Home / 389,207.80-584,006.10-220,857.40

Finding the Fourth Proportional to 389,207.80, 584,006.10 and 220,857.40

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Solution

The fourth proportional to 389,207.80, 584,006.10 and 220,857.40 is: 331,396.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,207.80 : 584,006.10 = 220,857.40 : x
  2. Step 2: Convert to fraction form
    389,207.80/584,006.10 = 220,857.40/x
  3. Step 3: Cross multiply
    389,207.80x = 584,006.10 × 220,857.40
  4. Step 4: Simplify right side
    389,207.80x = 128,982,068,830.14
  5. Step 5: Solve for x
    x = 128,982,068,830.14/389,207.80
  6. Step 6: Final answer
    x = 331,396.41

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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.