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Finding the Fourth Proportional to 553.71, 830.88 and 245.55

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Solution

The fourth proportional to 553.71, 830.88 and 245.55 is: 368.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.71 : 830.88 = 245.55 : x
  2. Step 2: Convert to fraction form
    553.71/830.88 = 245.55/x
  3. Step 3: Cross multiply
    553.71x = 830.88 × 245.55
  4. Step 4: Simplify right side
    553.71x = 204,022.58
  5. Step 5: Solve for x
    x = 204,022.58/553.71
  6. Step 6: Final answer
    x = 368.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.