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Finding the Fourth Proportional to 553.94, 764.19 and 320.93

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Solution

The fourth proportional to 553.94, 764.19 and 320.93 is: 442.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.94 : 764.19 = 320.93 : x
  2. Step 2: Convert to fraction form
    553.94/764.19 = 320.93/x
  3. Step 3: Cross multiply
    553.94x = 764.19 × 320.93
  4. Step 4: Simplify right side
    553.94x = 245,251.50
  5. Step 5: Solve for x
    x = 245,251.50/553.94
  6. Step 6: Final answer
    x = 442.74

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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.