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Finding the Fourth Proportional to 513.61, 704.95 and 457.11

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Solution

The fourth proportional to 513.61, 704.95 and 457.11 is: 627.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.61 : 704.95 = 457.11 : x
  2. Step 2: Convert to fraction form
    513.61/704.95 = 457.11/x
  3. Step 3: Cross multiply
    513.61x = 704.95 × 457.11
  4. Step 4: Simplify right side
    513.61x = 322,238.55
  5. Step 5: Solve for x
    x = 322,238.55/513.61
  6. Step 6: Final answer
    x = 627.40

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.