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Finding the Fourth Proportional to 1,670.92, 2,507.46 and 697.72

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Solution

The fourth proportional to 1,670.92, 2,507.46 and 697.72 is: 1,047.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.92 : 2,507.46 = 697.72 : x
  2. Step 2: Convert to fraction form
    1,670.92/2,507.46 = 697.72/x
  3. Step 3: Cross multiply
    1,670.92x = 2,507.46 × 697.72
  4. Step 4: Simplify right side
    1,670.92x = 1,749,504.99
  5. Step 5: Solve for x
    x = 1,749,504.99/1,670.92
  6. Step 6: Final answer
    x = 1,047.03

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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.