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Finding the Fourth Proportional to 609.92, 841.72 and 347.92

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Solution

The fourth proportional to 609.92, 841.72 and 347.92 is: 480.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.92 : 841.72 = 347.92 : x
  2. Step 2: Convert to fraction form
    609.92/841.72 = 347.92/x
  3. Step 3: Cross multiply
    609.92x = 841.72 × 347.92
  4. Step 4: Simplify right side
    609.92x = 292,851.22
  5. Step 5: Solve for x
    x = 292,851.22/609.92
  6. Step 6: Final answer
    x = 480.15

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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.