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Finding the Fourth Proportional to 772.51, 1,066.09 and 440.99

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Solution

The fourth proportional to 772.51, 1,066.09 and 440.99 is: 608.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.51 : 1,066.09 = 440.99 : x
  2. Step 2: Convert to fraction form
    772.51/1,066.09 = 440.99/x
  3. Step 3: Cross multiply
    772.51x = 1,066.09 × 440.99
  4. Step 4: Simplify right side
    772.51x = 470,129.70
  5. Step 5: Solve for x
    x = 470,129.70/772.51
  6. Step 6: Final answer
    x = 608.57

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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.