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Finding the Fourth Proportional to 899.20, 1,349.18 and 379.32

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Solution

The fourth proportional to 899.20, 1,349.18 and 379.32 is: 569.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.20 : 1,349.18 = 379.32 : x
  2. Step 2: Convert to fraction form
    899.20/1,349.18 = 379.32/x
  3. Step 3: Cross multiply
    899.20x = 1,349.18 × 379.32
  4. Step 4: Simplify right side
    899.20x = 511,770.96
  5. Step 5: Solve for x
    x = 511,770.96/899.20
  6. Step 6: Final answer
    x = 569.14

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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.