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Finding the Fourth Proportional to 390,521.62, 539,034.41 and 227,216.55

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Solution

The fourth proportional to 390,521.62, 539,034.41 and 227,216.55 is: 313,625.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,521.62 : 539,034.41 = 227,216.55 : x
  2. Step 2: Convert to fraction form
    390,521.62/539,034.41 = 227,216.55/x
  3. Step 3: Cross multiply
    390,521.62x = 539,034.41 × 227,216.55
  4. Step 4: Simplify right side
    390,521.62x = 122,477,538,971.49
  5. Step 5: Solve for x
    x = 122,477,538,971.49/390,521.62
  6. Step 6: Final answer
    x = 313,625.50

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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.