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Finding the Fourth Proportional to 611.39, 917.49 and 337.68

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Solution

The fourth proportional to 611.39, 917.49 and 337.68 is: 506.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.39 : 917.49 = 337.68 : x
  2. Step 2: Convert to fraction form
    611.39/917.49 = 337.68/x
  3. Step 3: Cross multiply
    611.39x = 917.49 × 337.68
  4. Step 4: Simplify right side
    611.39x = 309,818.02
  5. Step 5: Solve for x
    x = 309,818.02/611.39
  6. Step 6: Final answer
    x = 506.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.