Home / 285,631.38-428,507.01-85,966.38

Finding the Fourth Proportional to 285,631.38, 428,507.01 and 85,966.38

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Solution

The fourth proportional to 285,631.38, 428,507.01 and 85,966.38 is: 128,967.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,631.38 : 428,507.01 = 85,966.38 : x
  2. Step 2: Convert to fraction form
    285,631.38/428,507.01 = 85,966.38/x
  3. Step 3: Cross multiply
    285,631.38x = 428,507.01 × 85,966.38
  4. Step 4: Simplify right side
    285,631.38x = 36,837,196,454.32
  5. Step 5: Solve for x
    x = 36,837,196,454.32/285,631.38
  6. Step 6: Final answer
    x = 128,967.61

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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.