Home / 1,916.70-2,645.01-1,208.40

Finding the Fourth Proportional to 1,916.70, 2,645.01 and 1,208.40

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Solution

The fourth proportional to 1,916.70, 2,645.01 and 1,208.40 is: 1,667.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.70 : 2,645.01 = 1,208.40 : x
  2. Step 2: Convert to fraction form
    1,916.70/2,645.01 = 1,208.40/x
  3. Step 3: Cross multiply
    1,916.70x = 2,645.01 × 1,208.40
  4. Step 4: Simplify right side
    1,916.70x = 3,196,230.08
  5. Step 5: Solve for x
    x = 3,196,230.08/1,916.70
  6. Step 6: Final answer
    x = 1,667.57

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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.