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Finding the Fourth Proportional to 609.68, 841.40 and 347.64

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Solution

The fourth proportional to 609.68, 841.40 and 347.64 is: 479.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.68 : 841.40 = 347.64 : x
  2. Step 2: Convert to fraction form
    609.68/841.40 = 347.64/x
  3. Step 3: Cross multiply
    609.68x = 841.40 × 347.64
  4. Step 4: Simplify right side
    609.68x = 292,504.30
  5. Step 5: Solve for x
    x = 292,504.30/609.68
  6. Step 6: Final answer
    x = 479.77

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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.