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Finding the Fourth Proportional to 605.56, 836.46 and 418.72

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Solution

The fourth proportional to 605.56, 836.46 and 418.72 is: 578.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.56 : 836.46 = 418.72 : x
  2. Step 2: Convert to fraction form
    605.56/836.46 = 418.72/x
  3. Step 3: Cross multiply
    605.56x = 836.46 × 418.72
  4. Step 4: Simplify right side
    605.56x = 350,242.53
  5. Step 5: Solve for x
    x = 350,242.53/605.56
  6. Step 6: Final answer
    x = 578.38

Related Problems

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Double scale
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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.