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Finding the Fourth Proportional to 767.20, 1,058.75 and 472.36

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Solution

The fourth proportional to 767.20, 1,058.75 and 472.36 is: 651.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.20 : 1,058.75 = 472.36 : x
  2. Step 2: Convert to fraction form
    767.20/1,058.75 = 472.36/x
  3. Step 3: Cross multiply
    767.20x = 1,058.75 × 472.36
  4. Step 4: Simplify right side
    767.20x = 500,111.15
  5. Step 5: Solve for x
    x = 500,111.15/767.20
  6. Step 6: Final answer
    x = 651.87

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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.