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Finding the Fourth Proportional to 390,396.91, 538,531.35 and 227,035.53

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Solution

The fourth proportional to 390,396.91, 538,531.35 and 227,035.53 is: 313,183.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,396.91 : 538,531.35 = 227,035.53 : x
  2. Step 2: Convert to fraction form
    390,396.91/538,531.35 = 227,035.53/x
  3. Step 3: Cross multiply
    390,396.91x = 538,531.35 × 227,035.53
  4. Step 4: Simplify right side
    390,396.91x = 122,265,752,330.00
  5. Step 5: Solve for x
    x = 122,265,752,330.00/390,396.91
  6. Step 6: Final answer
    x = 313,183.19

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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.