Home / 1,681.23-2,318.62-1,208.89

Finding the Fourth Proportional to 1,681.23, 2,318.62 and 1,208.89

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Solution

The fourth proportional to 1,681.23, 2,318.62 and 1,208.89 is: 1,667.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.23 : 2,318.62 = 1,208.89 : x
  2. Step 2: Convert to fraction form
    1,681.23/2,318.62 = 1,208.89/x
  3. Step 3: Cross multiply
    1,681.23x = 2,318.62 × 1,208.89
  4. Step 4: Simplify right side
    1,681.23x = 2,802,956.53
  5. Step 5: Solve for x
    x = 2,802,956.53/1,681.23
  6. Step 6: Final answer
    x = 1,667.21

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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.