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Finding the Fourth Proportional to 995.19, 1,491.84 and 378.47

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Solution

The fourth proportional to 995.19, 1,491.84 and 378.47 is: 567.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.19 : 1,491.84 = 378.47 : x
  2. Step 2: Convert to fraction form
    995.19/1,491.84 = 378.47/x
  3. Step 3: Cross multiply
    995.19x = 1,491.84 × 378.47
  4. Step 4: Simplify right side
    995.19x = 564,609.23
  5. Step 5: Solve for x
    x = 564,609.23/995.19
  6. Step 6: Final answer
    x = 567.34

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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.