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Finding the Fourth Proportional to 954.82, 1,431.91 and 406.65

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Solution

The fourth proportional to 954.82, 1,431.91 and 406.65 is: 609.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.82 : 1,431.91 = 406.65 : x
  2. Step 2: Convert to fraction form
    954.82/1,431.91 = 406.65/x
  3. Step 3: Cross multiply
    954.82x = 1,431.91 × 406.65
  4. Step 4: Simplify right side
    954.82x = 582,292.08
  5. Step 5: Solve for x
    x = 582,292.08/954.82
  6. Step 6: Final answer
    x = 609.84

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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.