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Finding the Fourth Proportional to 1,868.08, 2,577.88 and 1,040.08

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Solution

The fourth proportional to 1,868.08, 2,577.88 and 1,040.08 is: 1,435.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.08 : 2,577.88 = 1,040.08 : x
  2. Step 2: Convert to fraction form
    1,868.08/2,577.88 = 1,040.08/x
  3. Step 3: Cross multiply
    1,868.08x = 2,577.88 × 1,040.08
  4. Step 4: Simplify right side
    1,868.08x = 2,681,201.43
  5. Step 5: Solve for x
    x = 2,681,201.43/1,868.08
  6. Step 6: Final answer
    x = 1,435.27

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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.