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Finding the Fourth Proportional to 418.52, 577.11 and 356.56

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Solution

The fourth proportional to 418.52, 577.11 and 356.56 is: 491.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.52 : 577.11 = 356.56 : x
  2. Step 2: Convert to fraction form
    418.52/577.11 = 356.56/x
  3. Step 3: Cross multiply
    418.52x = 577.11 × 356.56
  4. Step 4: Simplify right side
    418.52x = 205,774.34
  5. Step 5: Solve for x
    x = 205,774.34/418.52
  6. Step 6: Final answer
    x = 491.67

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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.