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Finding the Fourth Proportional to 1,069.95, 1,476.64 and 627.91

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Solution

The fourth proportional to 1,069.95, 1,476.64 and 627.91 is: 866.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.95 : 1,476.64 = 627.91 : x
  2. Step 2: Convert to fraction form
    1,069.95/1,476.64 = 627.91/x
  3. Step 3: Cross multiply
    1,069.95x = 1,476.64 × 627.91
  4. Step 4: Simplify right side
    1,069.95x = 927,197.02
  5. Step 5: Solve for x
    x = 927,197.02/1,069.95
  6. Step 6: Final answer
    x = 866.58

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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.