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Finding the Fourth Proportional to 890.10, 1,335.24 and 231.98

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Solution

The fourth proportional to 890.10, 1,335.24 and 231.98 is: 347.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.10 : 1,335.24 = 231.98 : x
  2. Step 2: Convert to fraction form
    890.10/1,335.24 = 231.98/x
  3. Step 3: Cross multiply
    890.10x = 1,335.24 × 231.98
  4. Step 4: Simplify right side
    890.10x = 309,742.30
  5. Step 5: Solve for x
    x = 309,742.30/890.10
  6. Step 6: Final answer
    x = 347.99

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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.