Home / 1,781.12-2,672.40-1,666.64

Finding the Fourth Proportional to 1,781.12, 2,672.40 and 1,666.64

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Solution

The fourth proportional to 1,781.12, 2,672.40 and 1,666.64 is: 2,500.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.12 : 2,672.40 = 1,666.64 : x
  2. Step 2: Convert to fraction form
    1,781.12/2,672.40 = 1,666.64/x
  3. Step 3: Cross multiply
    1,781.12x = 2,672.40 × 1,666.64
  4. Step 4: Simplify right side
    1,781.12x = 4,453,928.74
  5. Step 5: Solve for x
    x = 4,453,928.74/1,781.12
  6. Step 6: Final answer
    x = 2,500.63

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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.