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Finding the Fourth Proportional to 1,069.19, 1,475.51 and 627.11

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Solution

The fourth proportional to 1,069.19, 1,475.51 and 627.11 is: 865.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.19 : 1,475.51 = 627.11 : x
  2. Step 2: Convert to fraction form
    1,069.19/1,475.51 = 627.11/x
  3. Step 3: Cross multiply
    1,069.19x = 1,475.51 × 627.11
  4. Step 4: Simplify right side
    1,069.19x = 925,296.56
  5. Step 5: Solve for x
    x = 925,296.56/1,069.19
  6. Step 6: Final answer
    x = 865.42

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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.