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Finding the Fourth Proportional to 1,069.83, 1,476.47 and 671.56

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Solution

The fourth proportional to 1,069.83, 1,476.47 and 671.56 is: 926.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.83 : 1,476.47 = 671.56 : x
  2. Step 2: Convert to fraction form
    1,069.83/1,476.47 = 671.56/x
  3. Step 3: Cross multiply
    1,069.83x = 1,476.47 × 671.56
  4. Step 4: Simplify right side
    1,069.83x = 991,536.18
  5. Step 5: Solve for x
    x = 991,536.18/1,069.83
  6. Step 6: Final answer
    x = 926.82

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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.