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Finding the Fourth Proportional to 553.36, 830.21 and 322.21

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Solution

The fourth proportional to 553.36, 830.21 and 322.21 is: 483.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.36 : 830.21 = 322.21 : x
  2. Step 2: Convert to fraction form
    553.36/830.21 = 322.21/x
  3. Step 3: Cross multiply
    553.36x = 830.21 × 322.21
  4. Step 4: Simplify right side
    553.36x = 267,501.96
  5. Step 5: Solve for x
    x = 267,501.96/553.36
  6. Step 6: Final answer
    x = 483.41

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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.