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Finding the Fourth Proportional to 1,171, 1,756.68 and 440.68

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Solution

The fourth proportional to 1,171, 1,756.68 and 440.68 is: 661.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171 : 1,756.68 = 440.68 : x
  2. Step 2: Convert to fraction form
    1,171/1,756.68 = 440.68/x
  3. Step 3: Cross multiply
    1,171x = 1,756.68 × 440.68
  4. Step 4: Simplify right side
    1,171x = 774,133.74
  5. Step 5: Solve for x
    x = 774,133.74/1,171
  6. Step 6: Final answer
    x = 661.09

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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.