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Finding the Fourth Proportional to 767.52, 1,055.97 and 669.51

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Solution

The fourth proportional to 767.52, 1,055.97 and 669.51 is: 921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.52 : 1,055.97 = 669.51 : x
  2. Step 2: Convert to fraction form
    767.52/1,055.97 = 669.51/x
  3. Step 3: Cross multiply
    767.52x = 1,055.97 × 669.51
  4. Step 4: Simplify right side
    767.52x = 706,982.47
  5. Step 5: Solve for x
    x = 706,982.47/767.52
  6. Step 6: Final answer
    x = 921.13

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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.