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Finding the Fourth Proportional to 1,340.63, 2,010.74 and 451.18

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Solution

The fourth proportional to 1,340.63, 2,010.74 and 451.18 is: 676.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.63 : 2,010.74 = 451.18 : x
  2. Step 2: Convert to fraction form
    1,340.63/2,010.74 = 451.18/x
  3. Step 3: Cross multiply
    1,340.63x = 2,010.74 × 451.18
  4. Step 4: Simplify right side
    1,340.63x = 907,201.77
  5. Step 5: Solve for x
    x = 907,201.77/1,340.63
  6. Step 6: Final answer
    x = 676.70

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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.