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Finding the Fourth Proportional to 1,141.02, 1,574.62 and 668.80

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Solution

The fourth proportional to 1,141.02, 1,574.62 and 668.80 is: 922.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.02 : 1,574.62 = 668.80 : x
  2. Step 2: Convert to fraction form
    1,141.02/1,574.62 = 668.80/x
  3. Step 3: Cross multiply
    1,141.02x = 1,574.62 × 668.80
  4. Step 4: Simplify right side
    1,141.02x = 1,053,109.91
  5. Step 5: Solve for x
    x = 1,053,109.91/1,141.02
  6. Step 6: Final answer
    x = 922.95

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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.