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Finding the Fourth Proportional to 285,535.20, 428,108.40 and 108,015.60

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Solution

The fourth proportional to 285,535.20, 428,108.40 and 108,015.60 is: 161,949.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,535.20 : 428,108.40 = 108,015.60 : x
  2. Step 2: Convert to fraction form
    285,535.20/428,108.40 = 108,015.60/x
  3. Step 3: Cross multiply
    285,535.20x = 428,108.40 × 108,015.60
  4. Step 4: Simplify right side
    285,535.20x = 46,242,385,691.04
  5. Step 5: Solve for x
    x = 46,242,385,691.04/285,535.20
  6. Step 6: Final answer
    x = 161,949.86

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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.