Home / 1,916.51-2,646.30-1,287.59

Finding the Fourth Proportional to 1,916.51, 2,646.30 and 1,287.59

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Solution

The fourth proportional to 1,916.51, 2,646.30 and 1,287.59 is: 1,777.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.51 : 2,646.30 = 1,287.59 : x
  2. Step 2: Convert to fraction form
    1,916.51/2,646.30 = 1,287.59/x
  3. Step 3: Cross multiply
    1,916.51x = 2,646.30 × 1,287.59
  4. Step 4: Simplify right side
    1,916.51x = 3,407,336.19
  5. Step 5: Solve for x
    x = 3,407,336.19/1,916.51
  6. Step 6: Final answer
    x = 1,777.89

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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.