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Finding the Fourth Proportional to 1,091.64, 1,506.08 and 619.48

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Solution

The fourth proportional to 1,091.64, 1,506.08 and 619.48 is: 854.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.64 : 1,506.08 = 619.48 : x
  2. Step 2: Convert to fraction form
    1,091.64/1,506.08 = 619.48/x
  3. Step 3: Cross multiply
    1,091.64x = 1,506.08 × 619.48
  4. Step 4: Simplify right side
    1,091.64x = 932,986.44
  5. Step 5: Solve for x
    x = 932,986.44/1,091.64
  6. Step 6: Final answer
    x = 854.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.