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Finding the Fourth Proportional to 609.07, 840.57 and 347.12

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Solution

The fourth proportional to 609.07, 840.57 and 347.12 is: 479.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.07 : 840.57 = 347.12 : x
  2. Step 2: Convert to fraction form
    609.07/840.57 = 347.12/x
  3. Step 3: Cross multiply
    609.07x = 840.57 × 347.12
  4. Step 4: Simplify right side
    609.07x = 291,778.66
  5. Step 5: Solve for x
    x = 291,778.66/609.07
  6. Step 6: Final answer
    x = 479.06

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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.