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Finding the Fourth Proportional to 390,297.30, 538,603.26 and 220,527.78

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Solution

The fourth proportional to 390,297.30, 538,603.26 and 220,527.78 is: 304,324.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,297.30 : 538,603.26 = 220,527.78 : x
  2. Step 2: Convert to fraction form
    390,297.30/538,603.26 = 220,527.78/x
  3. Step 3: Cross multiply
    390,297.30x = 538,603.26 × 220,527.78
  4. Step 4: Simplify right side
    390,297.30x = 118,776,981,228.56
  5. Step 5: Solve for x
    x = 118,776,981,228.56/390,297.30
  6. Step 6: Final answer
    x = 304,324.37

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