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Finding the Fourth Proportional to 390,185.22, 585,216.78 and 123,910.68

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Solution

The fourth proportional to 390,185.22, 585,216.78 and 123,910.68 is: 185,846.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,185.22 : 585,216.78 = 123,910.68 : x
  2. Step 2: Convert to fraction form
    390,185.22/585,216.78 = 123,910.68/x
  3. Step 3: Cross multiply
    390,185.22x = 585,216.78 × 123,910.68
  4. Step 4: Simplify right side
    390,185.22x = 72,514,609,157.21
  5. Step 5: Solve for x
    x = 72,514,609,157.21/390,185.22
  6. Step 6: Final answer
    x = 185,846.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.