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Finding the Fourth Proportional to 390,651.68, 539,102 and 227,405.44

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Solution

The fourth proportional to 390,651.68, 539,102 and 227,405.44 is: 313,821.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,651.68 : 539,102 = 227,405.44 : x
  2. Step 2: Convert to fraction form
    390,651.68/539,102 = 227,405.44/x
  3. Step 3: Cross multiply
    390,651.68x = 539,102 × 227,405.44
  4. Step 4: Simplify right side
    390,651.68x = 122,594,727,514.88
  5. Step 5: Solve for x
    x = 122,594,727,514.88/390,651.68
  6. Step 6: Final answer
    x = 313,821.07

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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.