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Finding the Fourth Proportional to 885.05, 1,325.91 and 518.75

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Solution

The fourth proportional to 885.05, 1,325.91 and 518.75 is: 777.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.05 : 1,325.91 = 518.75 : x
  2. Step 2: Convert to fraction form
    885.05/1,325.91 = 518.75/x
  3. Step 3: Cross multiply
    885.05x = 1,325.91 × 518.75
  4. Step 4: Simplify right side
    885.05x = 687,810.55
  5. Step 5: Solve for x
    x = 687,810.55/885.05
  6. Step 6: Final answer
    x = 777.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.