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Finding the Fourth Proportional to 339.66, 469 and 274.48

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Solution

The fourth proportional to 339.66, 469 and 274.48 is: 379.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.66 : 469 = 274.48 : x
  2. Step 2: Convert to fraction form
    339.66/469 = 274.48/x
  3. Step 3: Cross multiply
    339.66x = 469 × 274.48
  4. Step 4: Simplify right side
    339.66x = 128,731.12
  5. Step 5: Solve for x
    x = 128,731.12/339.66
  6. Step 6: Final answer
    x = 379.00

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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.