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Finding the Fourth Proportional to 1,761.76, 2,643.60 and 1,066.72

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Solution

The fourth proportional to 1,761.76, 2,643.60 and 1,066.72 is: 1,600.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.76 : 2,643.60 = 1,066.72 : x
  2. Step 2: Convert to fraction form
    1,761.76/2,643.60 = 1,066.72/x
  3. Step 3: Cross multiply
    1,761.76x = 2,643.60 × 1,066.72
  4. Step 4: Simplify right side
    1,761.76x = 2,819,980.99
  5. Step 5: Solve for x
    x = 2,819,980.99/1,761.76
  6. Step 6: Final answer
    x = 1,600.66

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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.