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Finding the Fourth Proportional to 889.66, 1,335.17 and 403.05

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Solution

The fourth proportional to 889.66, 1,335.17 and 403.05 is: 604.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.66 : 1,335.17 = 403.05 : x
  2. Step 2: Convert to fraction form
    889.66/1,335.17 = 403.05/x
  3. Step 3: Cross multiply
    889.66x = 1,335.17 × 403.05
  4. Step 4: Simplify right side
    889.66x = 538,140.27
  5. Step 5: Solve for x
    x = 538,140.27/889.66
  6. Step 6: Final answer
    x = 604.88

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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.