Home / 285,528.20-428,292.30-85,879.40

Finding the Fourth Proportional to 285,528.20, 428,292.30 and 85,879.40

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Solution

The fourth proportional to 285,528.20, 428,292.30 and 85,879.40 is: 128,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,528.20 : 428,292.30 = 85,879.40 : x
  2. Step 2: Convert to fraction form
    285,528.20/428,292.30 = 85,879.40/x
  3. Step 3: Cross multiply
    285,528.20x = 428,292.30 × 85,879.40
  4. Step 4: Simplify right side
    285,528.20x = 36,781,485,748.62
  5. Step 5: Solve for x
    x = 36,781,485,748.62/285,528.20
  6. Step 6: Final answer
    x = 128,819.10

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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.