Home / 1,988.10-2,743.47-1,521.54

Finding the Fourth Proportional to 1,988.10, 2,743.47 and 1,521.54

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Solution

The fourth proportional to 1,988.10, 2,743.47 and 1,521.54 is: 2,099.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.10 : 2,743.47 = 1,521.54 : x
  2. Step 2: Convert to fraction form
    1,988.10/2,743.47 = 1,521.54/x
  3. Step 3: Cross multiply
    1,988.10x = 2,743.47 × 1,521.54
  4. Step 4: Simplify right side
    1,988.10x = 4,174,299.34
  5. Step 5: Solve for x
    x = 4,174,299.34/1,988.10
  6. Step 6: Final answer
    x = 2,099.64

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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.