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Finding the Fourth Proportional to 899.82, 1,349.99 and 380.04

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Solution

The fourth proportional to 899.82, 1,349.99 and 380.04 is: 570.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.82 : 1,349.99 = 380.04 : x
  2. Step 2: Convert to fraction form
    899.82/1,349.99 = 380.04/x
  3. Step 3: Cross multiply
    899.82x = 1,349.99 × 380.04
  4. Step 4: Simplify right side
    899.82x = 513,050.20
  5. Step 5: Solve for x
    x = 513,050.20/899.82
  6. Step 6: Final answer
    x = 570.17

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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.