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Finding the Fourth Proportional to 606.40, 836.38 and 385.12

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Solution

The fourth proportional to 606.40, 836.38 and 385.12 is: 531.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.40 : 836.38 = 385.12 : x
  2. Step 2: Convert to fraction form
    606.40/836.38 = 385.12/x
  3. Step 3: Cross multiply
    606.40x = 836.38 × 385.12
  4. Step 4: Simplify right side
    606.40x = 322,106.67
  5. Step 5: Solve for x
    x = 322,106.67/606.40
  6. Step 6: Final answer
    x = 531.18

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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.