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Finding the Fourth Proportional to 778.31, 1,075.25 and 581.48

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Solution

The fourth proportional to 778.31, 1,075.25 and 581.48 is: 803.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.31 : 1,075.25 = 581.48 : x
  2. Step 2: Convert to fraction form
    778.31/1,075.25 = 581.48/x
  3. Step 3: Cross multiply
    778.31x = 1,075.25 × 581.48
  4. Step 4: Simplify right side
    778.31x = 625,236.37
  5. Step 5: Solve for x
    x = 625,236.37/778.31
  6. Step 6: Final answer
    x = 803.33

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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.