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Finding the Fourth Proportional to 838.49, 1,256.90 and 376.38

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Solution

The fourth proportional to 838.49, 1,256.90 and 376.38 is: 564.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.49 : 1,256.90 = 376.38 : x
  2. Step 2: Convert to fraction form
    838.49/1,256.90 = 376.38/x
  3. Step 3: Cross multiply
    838.49x = 1,256.90 × 376.38
  4. Step 4: Simplify right side
    838.49x = 473,070.14
  5. Step 5: Solve for x
    x = 473,070.14/838.49
  6. Step 6: Final answer
    x = 564.20

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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.