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Finding the Fourth Proportional to 285,485.56, 428,227.08 and 85,805.08

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Solution

The fourth proportional to 285,485.56, 428,227.08 and 85,805.08 is: 128,707.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,485.56 : 428,227.08 = 85,805.08 : x
  2. Step 2: Convert to fraction form
    285,485.56/428,227.08 = 85,805.08/x
  3. Step 3: Cross multiply
    285,485.56x = 428,227.08 × 85,805.08
  4. Step 4: Simplify right side
    285,485.56x = 36,744,058,857.57
  5. Step 5: Solve for x
    x = 36,744,058,857.57/285,485.56
  6. Step 6: Final answer
    x = 128,707.24

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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.