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Finding the Fourth Proportional to 609.34, 840.89 and 347.37

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Solution

The fourth proportional to 609.34, 840.89 and 347.37 is: 479.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.34 : 840.89 = 347.37 : x
  2. Step 2: Convert to fraction form
    609.34/840.89 = 347.37/x
  3. Step 3: Cross multiply
    609.34x = 840.89 × 347.37
  4. Step 4: Simplify right side
    609.34x = 292,099.96
  5. Step 5: Solve for x
    x = 292,099.96/609.34
  6. Step 6: Final answer
    x = 479.37

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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.