Home / 389,905.20-584,857.80-109,422.45

Finding the Fourth Proportional to 389,905.20, 584,857.80 and 109,422.45

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Solution

The fourth proportional to 389,905.20, 584,857.80 and 109,422.45 is: 164,133.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,905.20 : 584,857.80 = 109,422.45 : x
  2. Step 2: Convert to fraction form
    389,905.20/584,857.80 = 109,422.45/x
  3. Step 3: Cross multiply
    389,905.20x = 584,857.80 × 109,422.45
  4. Step 4: Simplify right side
    389,905.20x = 63,996,573,377.61
  5. Step 5: Solve for x
    x = 63,996,573,377.61/389,905.20
  6. Step 6: Final answer
    x = 164,133.68

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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.