Home / 1,690.05-2,331.75-943.91

Finding the Fourth Proportional to 1,690.05, 2,331.75 and 943.91

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Solution

The fourth proportional to 1,690.05, 2,331.75 and 943.91 is: 1,302.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.05 : 2,331.75 = 943.91 : x
  2. Step 2: Convert to fraction form
    1,690.05/2,331.75 = 943.91/x
  3. Step 3: Cross multiply
    1,690.05x = 2,331.75 × 943.91
  4. Step 4: Simplify right side
    1,690.05x = 2,200,962.14
  5. Step 5: Solve for x
    x = 2,200,962.14/1,690.05
  6. Step 6: Final answer
    x = 1,302.31

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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.