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Finding the Fourth Proportional to 4,927.78, 7,391.75 and 1,640.82

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Solution

The fourth proportional to 4,927.78, 7,391.75 and 1,640.82 is: 2,461.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,927.78 : 7,391.75 = 1,640.82 : x
  2. Step 2: Convert to fraction form
    4,927.78/7,391.75 = 1,640.82/x
  3. Step 3: Cross multiply
    4,927.78x = 7,391.75 × 1,640.82
  4. Step 4: Simplify right side
    4,927.78x = 12,128,531.24
  5. Step 5: Solve for x
    x = 12,128,531.24/4,927.78
  6. Step 6: Final answer
    x = 2,461.26

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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.