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Finding the Fourth Proportional to 513.54, 709.80 and 454.11

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Solution

The fourth proportional to 513.54, 709.80 and 454.11 is: 627.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.54 : 709.80 = 454.11 : x
  2. Step 2: Convert to fraction form
    513.54/709.80 = 454.11/x
  3. Step 3: Cross multiply
    513.54x = 709.80 × 454.11
  4. Step 4: Simplify right side
    513.54x = 322,327.28
  5. Step 5: Solve for x
    x = 322,327.28/513.54
  6. Step 6: Final answer
    x = 627.66

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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.