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Finding the Fourth Proportional to 775.10, 1,069.59 and 713.18

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Solution

The fourth proportional to 775.10, 1,069.59 and 713.18 is: 984.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.10 : 1,069.59 = 713.18 : x
  2. Step 2: Convert to fraction form
    775.10/1,069.59 = 713.18/x
  3. Step 3: Cross multiply
    775.10x = 1,069.59 × 713.18
  4. Step 4: Simplify right side
    775.10x = 762,810.20
  5. Step 5: Solve for x
    x = 762,810.20/775.10
  6. Step 6: Final answer
    x = 984.14

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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.