Home / 390,338.06-538,659.52-220,568.54

Finding the Fourth Proportional to 390,338.06, 538,659.52 and 220,568.54

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Solution

The fourth proportional to 390,338.06, 538,659.52 and 220,568.54 is: 304,380.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,338.06 : 538,659.52 = 220,568.54 : x
  2. Step 2: Convert to fraction form
    390,338.06/538,659.52 = 220,568.54/x
  3. Step 3: Cross multiply
    390,338.06x = 538,659.52 × 220,568.54
  4. Step 4: Simplify right side
    390,338.06x = 118,811,340,638.78
  5. Step 5: Solve for x
    x = 118,811,340,638.78/390,338.06
  6. Step 6: Final answer
    x = 304,380.62

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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.