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Finding the Fourth Proportional to 651.45, 899.09 and 371.78

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Solution

The fourth proportional to 651.45, 899.09 and 371.78 is: 513.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.45 : 899.09 = 371.78 : x
  2. Step 2: Convert to fraction form
    651.45/899.09 = 371.78/x
  3. Step 3: Cross multiply
    651.45x = 899.09 × 371.78
  4. Step 4: Simplify right side
    651.45x = 334,257.33
  5. Step 5: Solve for x
    x = 334,257.33/651.45
  6. Step 6: Final answer
    x = 513.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.