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Finding the Fourth Proportional to 403, 555.48 and 347.44

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Solution

The fourth proportional to 403, 555.48 and 347.44 is: 478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403 : 555.48 = 347.44 : x
  2. Step 2: Convert to fraction form
    403/555.48 = 347.44/x
  3. Step 3: Cross multiply
    403x = 555.48 × 347.44
  4. Step 4: Simplify right side
    403x = 192,995.97
  5. Step 5: Solve for x
    x = 192,995.97/403
  6. Step 6: Final answer
    x = 478.90

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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.