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Finding the Fourth Proportional to 390,621.93, 585,326.84 and 270,912.39

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Solution

The fourth proportional to 390,621.93, 585,326.84 and 270,912.39 is: 405,948.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,621.93 : 585,326.84 = 270,912.39 : x
  2. Step 2: Convert to fraction form
    390,621.93/585,326.84 = 270,912.39/x
  3. Step 3: Cross multiply
    390,621.93x = 585,326.84 × 270,912.39
  4. Step 4: Simplify right side
    390,621.93x = 158,572,288,874.35
  5. Step 5: Solve for x
    x = 158,572,288,874.35/390,621.93
  6. Step 6: Final answer
    x = 405,948.25

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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.