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Finding the Fourth Proportional to 1,840.97, 2,540.90 and 1,210.39

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Solution

The fourth proportional to 1,840.97, 2,540.90 and 1,210.39 is: 1,670.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.97 : 2,540.90 = 1,210.39 : x
  2. Step 2: Convert to fraction form
    1,840.97/2,540.90 = 1,210.39/x
  3. Step 3: Cross multiply
    1,840.97x = 2,540.90 × 1,210.39
  4. Step 4: Simplify right side
    1,840.97x = 3,075,479.95
  5. Step 5: Solve for x
    x = 3,075,479.95/1,840.97
  6. Step 6: Final answer
    x = 1,670.58

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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.