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Finding the Fourth Proportional to 553.66, 763.24 and 396.01

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Solution

The fourth proportional to 553.66, 763.24 and 396.01 is: 545.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.66 : 763.24 = 396.01 : x
  2. Step 2: Convert to fraction form
    553.66/763.24 = 396.01/x
  3. Step 3: Cross multiply
    553.66x = 763.24 × 396.01
  4. Step 4: Simplify right side
    553.66x = 302,250.67
  5. Step 5: Solve for x
    x = 302,250.67/553.66
  6. Step 6: Final answer
    x = 545.91

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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.