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Finding the Fourth Proportional to 810.94, 1,119.12 and 531.36

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Solution

The fourth proportional to 810.94, 1,119.12 and 531.36 is: 733.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.94 : 1,119.12 = 531.36 : x
  2. Step 2: Convert to fraction form
    810.94/1,119.12 = 531.36/x
  3. Step 3: Cross multiply
    810.94x = 1,119.12 × 531.36
  4. Step 4: Simplify right side
    810.94x = 594,655.60
  5. Step 5: Solve for x
    x = 594,655.60/810.94
  6. Step 6: Final answer
    x = 733.29

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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.