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Finding the Fourth Proportional to 606.15, 909.36 and 389.43

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Solution

The fourth proportional to 606.15, 909.36 and 389.43 is: 584.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.15 : 909.36 = 389.43 : x
  2. Step 2: Convert to fraction form
    606.15/909.36 = 389.43/x
  3. Step 3: Cross multiply
    606.15x = 909.36 × 389.43
  4. Step 4: Simplify right side
    606.15x = 354,132.06
  5. Step 5: Solve for x
    x = 354,132.06/606.15
  6. Step 6: Final answer
    x = 584.23

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Double scale
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Similar ratio
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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.