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Finding the Fourth Proportional to 768.11, 1,058.76 and 704.54

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Solution

The fourth proportional to 768.11, 1,058.76 and 704.54 is: 971.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.11 : 1,058.76 = 704.54 : x
  2. Step 2: Convert to fraction form
    768.11/1,058.76 = 704.54/x
  3. Step 3: Cross multiply
    768.11x = 1,058.76 × 704.54
  4. Step 4: Simplify right side
    768.11x = 745,933.48
  5. Step 5: Solve for x
    x = 745,933.48/768.11
  6. Step 6: Final answer
    x = 971.13

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1.5x scale

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.