Home / 389,864.25-538,012.80-220,109.31

Finding the Fourth Proportional to 389,864.25, 538,012.80 and 220,109.31

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Solution

The fourth proportional to 389,864.25, 538,012.80 and 220,109.31 is: 303,750.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,864.25 : 538,012.80 = 220,109.31 : x
  2. Step 2: Convert to fraction form
    389,864.25/538,012.80 = 220,109.31/x
  3. Step 3: Cross multiply
    389,864.25x = 538,012.80 × 220,109.31
  4. Step 4: Simplify right side
    389,864.25x = 118,421,626,179.17
  5. Step 5: Solve for x
    x = 118,421,626,179.17/389,864.25
  6. Step 6: Final answer
    x = 303,750.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.