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Finding the Fourth Proportional to 606.80, 836.42 and 385.40

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Solution

The fourth proportional to 606.80, 836.42 and 385.40 is: 531.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.80 : 836.42 = 385.40 : x
  2. Step 2: Convert to fraction form
    606.80/836.42 = 385.40/x
  3. Step 3: Cross multiply
    606.80x = 836.42 × 385.40
  4. Step 4: Simplify right side
    606.80x = 322,356.27
  5. Step 5: Solve for x
    x = 322,356.27/606.80
  6. Step 6: Final answer
    x = 531.24

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1.5x scale

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.