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Finding the Fourth Proportional to 772.14, 1,065.63 and 461.64

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Solution

The fourth proportional to 772.14, 1,065.63 and 461.64 is: 637.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.14 : 1,065.63 = 461.64 : x
  2. Step 2: Convert to fraction form
    772.14/1,065.63 = 461.64/x
  3. Step 3: Cross multiply
    772.14x = 1,065.63 × 461.64
  4. Step 4: Simplify right side
    772.14x = 491,937.43
  5. Step 5: Solve for x
    x = 491,937.43/772.14
  6. Step 6: Final answer
    x = 637.11

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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.