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Finding the Fourth Proportional to 606.49, 836.05 and 428.87

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Solution

The fourth proportional to 606.49, 836.05 and 428.87 is: 591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.49 : 836.05 = 428.87 : x
  2. Step 2: Convert to fraction form
    606.49/836.05 = 428.87/x
  3. Step 3: Cross multiply
    606.49x = 836.05 × 428.87
  4. Step 4: Simplify right side
    606.49x = 358,556.76
  5. Step 5: Solve for x
    x = 358,556.76/606.49
  6. Step 6: Final answer
    x = 591.20

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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.