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Finding the Fourth Proportional to 1,116.46, 1,540.81 and 619.26

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Solution

The fourth proportional to 1,116.46, 1,540.81 and 619.26 is: 854.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.46 : 1,540.81 = 619.26 : x
  2. Step 2: Convert to fraction form
    1,116.46/1,540.81 = 619.26/x
  3. Step 3: Cross multiply
    1,116.46x = 1,540.81 × 619.26
  4. Step 4: Simplify right side
    1,116.46x = 954,160.45
  5. Step 5: Solve for x
    x = 954,160.45/1,116.46
  6. Step 6: Final answer
    x = 854.63

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1.5x scale

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.