Home / 1,681.67-2,318.82-1,231.49

Finding the Fourth Proportional to 1,681.67, 2,318.82 and 1,231.49

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Solution

The fourth proportional to 1,681.67, 2,318.82 and 1,231.49 is: 1,698.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.67 : 2,318.82 = 1,231.49 : x
  2. Step 2: Convert to fraction form
    1,681.67/2,318.82 = 1,231.49/x
  3. Step 3: Cross multiply
    1,681.67x = 2,318.82 × 1,231.49
  4. Step 4: Simplify right side
    1,681.67x = 2,855,603.64
  5. Step 5: Solve for x
    x = 2,855,603.64/1,681.67
  6. Step 6: Final answer
    x = 1,698.08

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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.