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Finding the Fourth Proportional to 609.34, 840.75 and 360.49

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Solution

The fourth proportional to 609.34, 840.75 and 360.49 is: 497.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.34 : 840.75 = 360.49 : x
  2. Step 2: Convert to fraction form
    609.34/840.75 = 360.49/x
  3. Step 3: Cross multiply
    609.34x = 840.75 × 360.49
  4. Step 4: Simplify right side
    609.34x = 303,081.97
  5. Step 5: Solve for x
    x = 303,081.97/609.34
  6. Step 6: Final answer
    x = 497.39

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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.