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Finding the Fourth Proportional to 769.83, 1,055.47 and 756.01

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Solution

The fourth proportional to 769.83, 1,055.47 and 756.01 is: 1,036.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.83 : 1,055.47 = 756.01 : x
  2. Step 2: Convert to fraction form
    769.83/1,055.47 = 756.01/x
  3. Step 3: Cross multiply
    769.83x = 1,055.47 × 756.01
  4. Step 4: Simplify right side
    769.83x = 797,945.87
  5. Step 5: Solve for x
    x = 797,945.87/769.83
  6. Step 6: Final answer
    x = 1,036.52

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.