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Finding the Fourth Proportional to 606.85, 837.57 and 386.05

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Solution

The fourth proportional to 606.85, 837.57 and 386.05 is: 532.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.85 : 837.57 = 386.05 : x
  2. Step 2: Convert to fraction form
    606.85/837.57 = 386.05/x
  3. Step 3: Cross multiply
    606.85x = 837.57 × 386.05
  4. Step 4: Simplify right side
    606.85x = 323,343.90
  5. Step 5: Solve for x
    x = 323,343.90/606.85
  6. Step 6: Final answer
    x = 532.82

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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.