Home / 390,302.28-538,557.66-220,474.44

Finding the Fourth Proportional to 390,302.28, 538,557.66 and 220,474.44

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Solution

The fourth proportional to 390,302.28, 538,557.66 and 220,474.44 is: 304,221.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,302.28 : 538,557.66 = 220,474.44 : x
  2. Step 2: Convert to fraction form
    390,302.28/538,557.66 = 220,474.44/x
  3. Step 3: Cross multiply
    390,302.28x = 538,557.66 × 220,474.44
  4. Step 4: Simplify right side
    390,302.28x = 118,738,198,496.21
  5. Step 5: Solve for x
    x = 118,738,198,496.21/390,302.28
  6. Step 6: Final answer
    x = 304,221.12

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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.