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Finding the Fourth Proportional to 1,640.12, 2,264.18 and 1,118.89

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Solution

The fourth proportional to 1,640.12, 2,264.18 and 1,118.89 is: 1,544.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.12 : 2,264.18 = 1,118.89 : x
  2. Step 2: Convert to fraction form
    1,640.12/2,264.18 = 1,118.89/x
  3. Step 3: Cross multiply
    1,640.12x = 2,264.18 × 1,118.89
  4. Step 4: Simplify right side
    1,640.12x = 2,533,368.36
  5. Step 5: Solve for x
    x = 2,533,368.36/1,640.12
  6. Step 6: Final answer
    x = 1,544.62

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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.