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Finding the Fourth Proportional to 515.64, 772.72 and 223.06

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Solution

The fourth proportional to 515.64, 772.72 and 223.06 is: 334.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.64 : 772.72 = 223.06 : x
  2. Step 2: Convert to fraction form
    515.64/772.72 = 223.06/x
  3. Step 3: Cross multiply
    515.64x = 772.72 × 223.06
  4. Step 4: Simplify right side
    515.64x = 172,362.92
  5. Step 5: Solve for x
    x = 172,362.92/515.64
  6. Step 6: Final answer
    x = 334.27

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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.