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Finding the Fourth Proportional to 772.20, 1,066.10 and 606.01

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Solution

The fourth proportional to 772.20, 1,066.10 and 606.01 is: 836.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.20 : 1,066.10 = 606.01 : x
  2. Step 2: Convert to fraction form
    772.20/1,066.10 = 606.01/x
  3. Step 3: Cross multiply
    772.20x = 1,066.10 × 606.01
  4. Step 4: Simplify right side
    772.20x = 646,067.26
  5. Step 5: Solve for x
    x = 646,067.26/772.20
  6. Step 6: Final answer
    x = 836.66

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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.