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Finding the Fourth Proportional to 767.51, 1,058.89 and 518.44

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Solution

The fourth proportional to 767.51, 1,058.89 and 518.44 is: 715.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.51 : 1,058.89 = 518.44 : x
  2. Step 2: Convert to fraction form
    767.51/1,058.89 = 518.44/x
  3. Step 3: Cross multiply
    767.51x = 1,058.89 × 518.44
  4. Step 4: Simplify right side
    767.51x = 548,970.93
  5. Step 5: Solve for x
    x = 548,970.93/767.51
  6. Step 6: Final answer
    x = 715.26

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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.