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Finding the Fourth Proportional to 1,069.81, 1,476.24 and 627.63

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Solution

The fourth proportional to 1,069.81, 1,476.24 and 627.63 is: 866.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.81 : 1,476.24 = 627.63 : x
  2. Step 2: Convert to fraction form
    1,069.81/1,476.24 = 627.63/x
  3. Step 3: Cross multiply
    1,069.81x = 1,476.24 × 627.63
  4. Step 4: Simplify right side
    1,069.81x = 926,532.51
  5. Step 5: Solve for x
    x = 926,532.51/1,069.81
  6. Step 6: Final answer
    x = 866.07

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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.