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Finding the Fourth Proportional to 772.50, 1,066.94 and 563.62

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Solution

The fourth proportional to 772.50, 1,066.94 and 563.62 is: 778.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.50 : 1,066.94 = 563.62 : x
  2. Step 2: Convert to fraction form
    772.50/1,066.94 = 563.62/x
  3. Step 3: Cross multiply
    772.50x = 1,066.94 × 563.62
  4. Step 4: Simplify right side
    772.50x = 601,348.72
  5. Step 5: Solve for x
    x = 601,348.72/772.50
  6. Step 6: Final answer
    x = 778.44

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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.