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Finding the Fourth Proportional to 253.40, 349.58 and 170.55

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Solution

The fourth proportional to 253.40, 349.58 and 170.55 is: 235.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.40 : 349.58 = 170.55 : x
  2. Step 2: Convert to fraction form
    253.40/349.58 = 170.55/x
  3. Step 3: Cross multiply
    253.40x = 349.58 × 170.55
  4. Step 4: Simplify right side
    253.40x = 59,620.02
  5. Step 5: Solve for x
    x = 59,620.02/253.40
  6. Step 6: Final answer
    x = 235.28

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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.