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Finding the Fourth Proportional to 801.28, 1,106.31 and 502.65

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Solution

The fourth proportional to 801.28, 1,106.31 and 502.65 is: 694.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.28 : 1,106.31 = 502.65 : x
  2. Step 2: Convert to fraction form
    801.28/1,106.31 = 502.65/x
  3. Step 3: Cross multiply
    801.28x = 1,106.31 × 502.65
  4. Step 4: Simplify right side
    801.28x = 556,086.72
  5. Step 5: Solve for x
    x = 556,086.72/801.28
  6. Step 6: Final answer
    x = 694.00

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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.