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Finding the Fourth Proportional to 779.96, 1,075.07 and 517.52

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Solution

The fourth proportional to 779.96, 1,075.07 and 517.52 is: 713.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.96 : 1,075.07 = 517.52 : x
  2. Step 2: Convert to fraction form
    779.96/1,075.07 = 517.52/x
  3. Step 3: Cross multiply
    779.96x = 1,075.07 × 517.52
  4. Step 4: Simplify right side
    779.96x = 556,374.21
  5. Step 5: Solve for x
    x = 556,374.21/779.96
  6. Step 6: Final answer
    x = 713.33

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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.