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Finding the Fourth Proportional to 553.98, 830.45 and 188.51

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Solution

The fourth proportional to 553.98, 830.45 and 188.51 is: 282.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.98 : 830.45 = 188.51 : x
  2. Step 2: Convert to fraction form
    553.98/830.45 = 188.51/x
  3. Step 3: Cross multiply
    553.98x = 830.45 × 188.51
  4. Step 4: Simplify right side
    553.98x = 156,548.13
  5. Step 5: Solve for x
    x = 156,548.13/553.98
  6. Step 6: Final answer
    x = 282.59

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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.