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Finding the Fourth Proportional to 261.03, 389.90 and 222.27

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Solution

The fourth proportional to 261.03, 389.90 and 222.27 is: 332.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.03 : 389.90 = 222.27 : x
  2. Step 2: Convert to fraction form
    261.03/389.90 = 222.27/x
  3. Step 3: Cross multiply
    261.03x = 389.90 × 222.27
  4. Step 4: Simplify right side
    261.03x = 86,661.96
  5. Step 5: Solve for x
    x = 86,661.96/261.03
  6. Step 6: Final answer
    x = 332.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.