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Finding the Fourth Proportional to 1,182.57, 1,774 and 661.45

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Solution

The fourth proportional to 1,182.57, 1,774 and 661.45 is: 992.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.57 : 1,774 = 661.45 : x
  2. Step 2: Convert to fraction form
    1,182.57/1,774 = 661.45/x
  3. Step 3: Cross multiply
    1,182.57x = 1,774 × 661.45
  4. Step 4: Simplify right side
    1,182.57x = 1,173,412.30
  5. Step 5: Solve for x
    x = 1,173,412.30/1,182.57
  6. Step 6: Final answer
    x = 992.26

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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.