Home / 1,990.31-2,984.44-1,053.76

Finding the Fourth Proportional to 1,990.31, 2,984.44 and 1,053.76

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Solution

The fourth proportional to 1,990.31, 2,984.44 and 1,053.76 is: 1,580.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.31 : 2,984.44 = 1,053.76 : x
  2. Step 2: Convert to fraction form
    1,990.31/2,984.44 = 1,053.76/x
  3. Step 3: Cross multiply
    1,990.31x = 2,984.44 × 1,053.76
  4. Step 4: Simplify right side
    1,990.31x = 3,144,883.49
  5. Step 5: Solve for x
    x = 3,144,883.49/1,990.31
  6. Step 6: Final answer
    x = 1,580.10

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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.