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Finding the Fourth Proportional to 838.79, 1,257.28 and 375.93

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Solution

The fourth proportional to 838.79, 1,257.28 and 375.93 is: 563.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.79 : 1,257.28 = 375.93 : x
  2. Step 2: Convert to fraction form
    838.79/1,257.28 = 375.93/x
  3. Step 3: Cross multiply
    838.79x = 1,257.28 × 375.93
  4. Step 4: Simplify right side
    838.79x = 472,649.27
  5. Step 5: Solve for x
    x = 472,649.27/838.79
  6. Step 6: Final answer
    x = 563.49

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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.