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Finding the Fourth Proportional to 285,763.30, 428,207.55 and 270,016.90

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Solution

The fourth proportional to 285,763.30, 428,207.55 and 270,016.90 is: 404,612.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,763.30 : 428,207.55 = 270,016.90 : x
  2. Step 2: Convert to fraction form
    285,763.30/428,207.55 = 270,016.90/x
  3. Step 3: Cross multiply
    285,763.30x = 428,207.55 × 270,016.90
  4. Step 4: Simplify right side
    285,763.30x = 115,623,275,207.60
  5. Step 5: Solve for x
    x = 115,623,275,207.60/285,763.30
  6. Step 6: Final answer
    x = 404,612.05

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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.