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Finding the Fourth Proportional to 390,508.76, 585,157.27 and 270,799.22

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Solution

The fourth proportional to 390,508.76, 585,157.27 and 270,799.22 is: 405,778.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,508.76 : 585,157.27 = 270,799.22 : x
  2. Step 2: Convert to fraction form
    390,508.76/585,157.27 = 270,799.22/x
  3. Step 3: Cross multiply
    390,508.76x = 585,157.27 × 270,799.22
  4. Step 4: Simplify right side
    390,508.76x = 158,460,129,367.54
  5. Step 5: Solve for x
    x = 158,460,129,367.54/390,508.76
  6. Step 6: Final answer
    x = 405,778.68

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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.