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Finding the Fourth Proportional to 889.52, 1,332.72 and 518.81

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Solution

The fourth proportional to 889.52, 1,332.72 and 518.81 is: 777.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.52 : 1,332.72 = 518.81 : x
  2. Step 2: Convert to fraction form
    889.52/1,332.72 = 518.81/x
  3. Step 3: Cross multiply
    889.52x = 1,332.72 × 518.81
  4. Step 4: Simplify right side
    889.52x = 691,421.80
  5. Step 5: Solve for x
    x = 691,421.80/889.52
  6. Step 6: Final answer
    x = 777.30

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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.