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Finding the Fourth Proportional to 1,707.94, 2,561.77 and 667.74

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Solution

The fourth proportional to 1,707.94, 2,561.77 and 667.74 is: 1,001.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,707.94 : 2,561.77 = 667.74 : x
  2. Step 2: Convert to fraction form
    1,707.94/2,561.77 = 667.74/x
  3. Step 3: Cross multiply
    1,707.94x = 2,561.77 × 667.74
  4. Step 4: Simplify right side
    1,707.94x = 1,710,596.30
  5. Step 5: Solve for x
    x = 1,710,596.30/1,707.94
  6. Step 6: Final answer
    x = 1,001.56

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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.