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Finding the Fourth Proportional to 566.72, 782.12 and 318.12

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Solution

The fourth proportional to 566.72, 782.12 and 318.12 is: 439.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.72 : 782.12 = 318.12 : x
  2. Step 2: Convert to fraction form
    566.72/782.12 = 318.12/x
  3. Step 3: Cross multiply
    566.72x = 782.12 × 318.12
  4. Step 4: Simplify right side
    566.72x = 248,808.01
  5. Step 5: Solve for x
    x = 248,808.01/566.72
  6. Step 6: Final answer
    x = 439.03

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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.