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Finding the Fourth Proportional to 285,329.56, 428,065.54 and 85,653.64

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Solution

The fourth proportional to 285,329.56, 428,065.54 and 85,653.64 is: 128,501.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,329.56 : 428,065.54 = 85,653.64 : x
  2. Step 2: Convert to fraction form
    285,329.56/428,065.54 = 85,653.64/x
  3. Step 3: Cross multiply
    285,329.56x = 428,065.54 × 85,653.64
  4. Step 4: Simplify right side
    285,329.56x = 36,665,371,659.57
  5. Step 5: Solve for x
    x = 36,665,371,659.57/285,329.56
  6. Step 6: Final answer
    x = 128,501.83

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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.