Home / 1,661.40-2,292.67-905.14

Finding the Fourth Proportional to 1,661.40, 2,292.67 and 905.14

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Solution

The fourth proportional to 1,661.40, 2,292.67 and 905.14 is: 1,249.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.40 : 2,292.67 = 905.14 : x
  2. Step 2: Convert to fraction form
    1,661.40/2,292.67 = 905.14/x
  3. Step 3: Cross multiply
    1,661.40x = 2,292.67 × 905.14
  4. Step 4: Simplify right side
    1,661.40x = 2,075,187.32
  5. Step 5: Solve for x
    x = 2,075,187.32/1,661.40
  6. Step 6: Final answer
    x = 1,249.06

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1.5x scale

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.