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Finding the Fourth Proportional to 899.84, 1,349.26 and 379.76

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Solution

The fourth proportional to 899.84, 1,349.26 and 379.76 is: 569.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.84 : 1,349.26 = 379.76 : x
  2. Step 2: Convert to fraction form
    899.84/1,349.26 = 379.76/x
  3. Step 3: Cross multiply
    899.84x = 1,349.26 × 379.76
  4. Step 4: Simplify right side
    899.84x = 512,387.28
  5. Step 5: Solve for x
    x = 512,387.28/899.84
  6. Step 6: Final answer
    x = 569.42

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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.