Home / 1,690.53-2,331.76-1,551.11

Finding the Fourth Proportional to 1,690.53, 2,331.76 and 1,551.11

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Solution

The fourth proportional to 1,690.53, 2,331.76 and 1,551.11 is: 2,139.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.53 : 2,331.76 = 1,551.11 : x
  2. Step 2: Convert to fraction form
    1,690.53/2,331.76 = 1,551.11/x
  3. Step 3: Cross multiply
    1,690.53x = 2,331.76 × 1,551.11
  4. Step 4: Simplify right side
    1,690.53x = 3,616,816.25
  5. Step 5: Solve for x
    x = 3,616,816.25/1,690.53
  6. Step 6: Final answer
    x = 2,139.46

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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.