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Finding the Fourth Proportional to 1,173.99, 1,620.25 and 669.97

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Solution

The fourth proportional to 1,173.99, 1,620.25 and 669.97 is: 924.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.99 : 1,620.25 = 669.97 : x
  2. Step 2: Convert to fraction form
    1,173.99/1,620.25 = 669.97/x
  3. Step 3: Cross multiply
    1,173.99x = 1,620.25 × 669.97
  4. Step 4: Simplify right side
    1,173.99x = 1,085,510.79
  5. Step 5: Solve for x
    x = 1,085,510.79/1,173.99
  6. Step 6: Final answer
    x = 924.63

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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.