Home / 1,916.88-2,646.96-1,209.99

Finding the Fourth Proportional to 1,916.88, 2,646.96 and 1,209.99

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Solution

The fourth proportional to 1,916.88, 2,646.96 and 1,209.99 is: 1,670.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.88 : 2,646.96 = 1,209.99 : x
  2. Step 2: Convert to fraction form
    1,916.88/2,646.96 = 1,209.99/x
  3. Step 3: Cross multiply
    1,916.88x = 2,646.96 × 1,209.99
  4. Step 4: Simplify right side
    1,916.88x = 3,202,795.13
  5. Step 5: Solve for x
    x = 3,202,795.13/1,916.88
  6. Step 6: Final answer
    x = 1,670.84

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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.