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Finding the Fourth Proportional to 813.51, 1,121.18 and 592.11

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Solution

The fourth proportional to 813.51, 1,121.18 and 592.11 is: 816.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.51 : 1,121.18 = 592.11 : x
  2. Step 2: Convert to fraction form
    813.51/1,121.18 = 592.11/x
  3. Step 3: Cross multiply
    813.51x = 1,121.18 × 592.11
  4. Step 4: Simplify right side
    813.51x = 663,858.93
  5. Step 5: Solve for x
    x = 663,858.93/813.51
  6. Step 6: Final answer
    x = 816.04

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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.