Home / 1,208.07-1,668.45-972.79

Finding the Fourth Proportional to 1,208.07, 1,668.45 and 972.79

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Solution

The fourth proportional to 1,208.07, 1,668.45 and 972.79 is: 1,343.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.07 : 1,668.45 = 972.79 : x
  2. Step 2: Convert to fraction form
    1,208.07/1,668.45 = 972.79/x
  3. Step 3: Cross multiply
    1,208.07x = 1,668.45 × 972.79
  4. Step 4: Simplify right side
    1,208.07x = 1,623,054.87
  5. Step 5: Solve for x
    x = 1,623,054.87/1,208.07
  6. Step 6: Final answer
    x = 1,343.51

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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.