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Finding the Fourth Proportional to 285,799.55, 428,788.56 and 172,072.04

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Solution

The fourth proportional to 285,799.55, 428,788.56 and 172,072.04 is: 258,161.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,799.55 : 428,788.56 = 172,072.04 : x
  2. Step 2: Convert to fraction form
    285,799.55/428,788.56 = 172,072.04/x
  3. Step 3: Cross multiply
    285,799.55x = 428,788.56 × 172,072.04
  4. Step 4: Simplify right side
    285,799.55x = 73,782,522,247.86
  5. Step 5: Solve for x
    x = 73,782,522,247.86/285,799.55
  6. Step 6: Final answer
    x = 258,161.79

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1.5x scale

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.