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Finding the Fourth Proportional to 899.30, 1,349.07 and 314.21

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Solution

The fourth proportional to 899.30, 1,349.07 and 314.21 is: 471.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.30 : 1,349.07 = 314.21 : x
  2. Step 2: Convert to fraction form
    899.30/1,349.07 = 314.21/x
  3. Step 3: Cross multiply
    899.30x = 1,349.07 × 314.21
  4. Step 4: Simplify right side
    899.30x = 423,891.79
  5. Step 5: Solve for x
    x = 423,891.79/899.30
  6. Step 6: Final answer
    x = 471.36

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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.