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Finding the Fourth Proportional to 995.17, 1,491.18 and 378.52

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Solution

The fourth proportional to 995.17, 1,491.18 and 378.52 is: 567.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.17 : 1,491.18 = 378.52 : x
  2. Step 2: Convert to fraction form
    995.17/1,491.18 = 378.52/x
  3. Step 3: Cross multiply
    995.17x = 1,491.18 × 378.52
  4. Step 4: Simplify right side
    995.17x = 564,441.45
  5. Step 5: Solve for x
    x = 564,441.45/995.17
  6. Step 6: Final answer
    x = 567.18

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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.