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Finding the Fourth Proportional to 606.40, 836.16 and 490.24

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Solution

The fourth proportional to 606.40, 836.16 and 490.24 is: 675.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.40 : 836.16 = 490.24 : x
  2. Step 2: Convert to fraction form
    606.40/836.16 = 490.24/x
  3. Step 3: Cross multiply
    606.40x = 836.16 × 490.24
  4. Step 4: Simplify right side
    606.40x = 409,919.08
  5. Step 5: Solve for x
    x = 409,919.08/606.40
  6. Step 6: Final answer
    x = 675.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.