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Finding the Fourth Proportional to 285,552.20, 428,328.30 and 85,903.40

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Solution

The fourth proportional to 285,552.20, 428,328.30 and 85,903.40 is: 128,855.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,552.20 : 428,328.30 = 85,903.40 : x
  2. Step 2: Convert to fraction form
    285,552.20/428,328.30 = 85,903.40/x
  3. Step 3: Cross multiply
    285,552.20x = 428,328.30 × 85,903.40
  4. Step 4: Simplify right side
    285,552.20x = 36,794,857,286.22
  5. Step 5: Solve for x
    x = 36,794,857,286.22/285,552.20
  6. Step 6: Final answer
    x = 128,855.10

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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.