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Finding the Fourth Proportional to 344.66, 474.62 and 257.18

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Solution

The fourth proportional to 344.66, 474.62 and 257.18 is: 354.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.66 : 474.62 = 257.18 : x
  2. Step 2: Convert to fraction form
    344.66/474.62 = 257.18/x
  3. Step 3: Cross multiply
    344.66x = 474.62 × 257.18
  4. Step 4: Simplify right side
    344.66x = 122,062.77
  5. Step 5: Solve for x
    x = 122,062.77/344.66
  6. Step 6: Final answer
    x = 354.15

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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.