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Finding the Fourth Proportional to 873.11, 1,204.75 and 518.90

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Solution

The fourth proportional to 873.11, 1,204.75 and 518.90 is: 716.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.11 : 1,204.75 = 518.90 : x
  2. Step 2: Convert to fraction form
    873.11/1,204.75 = 518.90/x
  3. Step 3: Cross multiply
    873.11x = 1,204.75 × 518.90
  4. Step 4: Simplify right side
    873.11x = 625,143.06
  5. Step 5: Solve for x
    x = 625,143.06/873.11
  6. Step 6: Final answer
    x = 716.00

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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.