Home / 1,899.76-2,621.64-1,071.76

Finding the Fourth Proportional to 1,899.76, 2,621.64 and 1,071.76

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Solution

The fourth proportional to 1,899.76, 2,621.64 and 1,071.76 is: 1,479.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.76 : 2,621.64 = 1,071.76 : x
  2. Step 2: Convert to fraction form
    1,899.76/2,621.64 = 1,071.76/x
  3. Step 3: Cross multiply
    1,899.76x = 2,621.64 × 1,071.76
  4. Step 4: Simplify right side
    1,899.76x = 2,809,768.89
  5. Step 5: Solve for x
    x = 2,809,768.89/1,899.76
  6. Step 6: Final answer
    x = 1,479.01

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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.