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Finding the Fourth Proportional to 1,069.66, 1,476.12 and 627.88

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Solution

The fourth proportional to 1,069.66, 1,476.12 and 627.88 is: 866.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.66 : 1,476.12 = 627.88 : x
  2. Step 2: Convert to fraction form
    1,069.66/1,476.12 = 627.88/x
  3. Step 3: Cross multiply
    1,069.66x = 1,476.12 × 627.88
  4. Step 4: Simplify right side
    1,069.66x = 926,826.23
  5. Step 5: Solve for x
    x = 926,826.23/1,069.66
  6. Step 6: Final answer
    x = 866.47

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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.