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Finding the Fourth Proportional to 2,443.60, 3,666.60 and 1,858.40

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Solution

The fourth proportional to 2,443.60, 3,666.60 and 1,858.40 is: 2,788.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,443.60 : 3,666.60 = 1,858.40 : x
  2. Step 2: Convert to fraction form
    2,443.60/3,666.60 = 1,858.40/x
  3. Step 3: Cross multiply
    2,443.60x = 3,666.60 × 1,858.40
  4. Step 4: Simplify right side
    2,443.60x = 6,814,009.44
  5. Step 5: Solve for x
    x = 6,814,009.44/2,443.60
  6. Step 6: Final answer
    x = 2,788.51

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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.