Home / 389,921.20-584,886.64-137,209.28

Finding the Fourth Proportional to 389,921.20, 584,886.64 and 137,209.28

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Solution

The fourth proportional to 389,921.20, 584,886.64 and 137,209.28 is: 205,815.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,921.20 : 584,886.64 = 137,209.28 : x
  2. Step 2: Convert to fraction form
    389,921.20/584,886.64 = 137,209.28/x
  3. Step 3: Cross multiply
    389,921.20x = 584,886.64 × 137,209.28
  4. Step 4: Simplify right side
    389,921.20x = 80,251,874,756.02
  5. Step 5: Solve for x
    x = 80,251,874,756.02/389,921.20
  6. Step 6: Final answer
    x = 205,815.62

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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.