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Finding the Fourth Proportional to 1,670.72, 2,505.11 and 574.79

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Solution

The fourth proportional to 1,670.72, 2,505.11 and 574.79 is: 861.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.72 : 2,505.11 = 574.79 : x
  2. Step 2: Convert to fraction form
    1,670.72/2,505.11 = 574.79/x
  3. Step 3: Cross multiply
    1,670.72x = 2,505.11 × 574.79
  4. Step 4: Simplify right side
    1,670.72x = 1,439,896.78
  5. Step 5: Solve for x
    x = 1,439,896.78/1,670.72
  6. Step 6: Final answer
    x = 861.84

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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.