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Finding the Fourth Proportional to 838.07, 1,253.52 and 490.53

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Solution

The fourth proportional to 838.07, 1,253.52 and 490.53 is: 733.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.07 : 1,253.52 = 490.53 : x
  2. Step 2: Convert to fraction form
    838.07/1,253.52 = 490.53/x
  3. Step 3: Cross multiply
    838.07x = 1,253.52 × 490.53
  4. Step 4: Simplify right side
    838.07x = 614,889.17
  5. Step 5: Solve for x
    x = 614,889.17/838.07
  6. Step 6: Final answer
    x = 733.70

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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.