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Finding the Fourth Proportional to 1,670.72, 2,506.08 and 516.32

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Solution

The fourth proportional to 1,670.72, 2,506.08 and 516.32 is: 774.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.72 : 2,506.08 = 516.32 : x
  2. Step 2: Convert to fraction form
    1,670.72/2,506.08 = 516.32/x
  3. Step 3: Cross multiply
    1,670.72x = 2,506.08 × 516.32
  4. Step 4: Simplify right side
    1,670.72x = 1,293,939.23
  5. Step 5: Solve for x
    x = 1,293,939.23/1,670.72
  6. Step 6: Final answer
    x = 774.48

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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.