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Finding the Fourth Proportional to 1,402.74, 1,935.75 and 813.27

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Solution

The fourth proportional to 1,402.74, 1,935.75 and 813.27 is: 1,122.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.74 : 1,935.75 = 813.27 : x
  2. Step 2: Convert to fraction form
    1,402.74/1,935.75 = 813.27/x
  3. Step 3: Cross multiply
    1,402.74x = 1,935.75 × 813.27
  4. Step 4: Simplify right side
    1,402.74x = 1,574,287.40
  5. Step 5: Solve for x
    x = 1,574,287.40/1,402.74
  6. Step 6: Final answer
    x = 1,122.29

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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.