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Finding the Fourth Proportional to 651.62, 899.19 and 371.81

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Solution

The fourth proportional to 651.62, 899.19 and 371.81 is: 513.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.62 : 899.19 = 371.81 : x
  2. Step 2: Convert to fraction form
    651.62/899.19 = 371.81/x
  3. Step 3: Cross multiply
    651.62x = 899.19 × 371.81
  4. Step 4: Simplify right side
    651.62x = 334,323.34
  5. Step 5: Solve for x
    x = 334,323.34/651.62
  6. Step 6: Final answer
    x = 513.07

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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.