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Finding the Fourth Proportional to 889.56, 1,332.81 and 499.32

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Solution

The fourth proportional to 889.56, 1,332.81 and 499.32 is: 748.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.56 : 1,332.81 = 499.32 : x
  2. Step 2: Convert to fraction form
    889.56/1,332.81 = 499.32/x
  3. Step 3: Cross multiply
    889.56x = 1,332.81 × 499.32
  4. Step 4: Simplify right side
    889.56x = 665,498.69
  5. Step 5: Solve for x
    x = 665,498.69/889.56
  6. Step 6: Final answer
    x = 748.12

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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.