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Finding the Fourth Proportional to 1,661.02, 2,291.70 and 952.78

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Solution

The fourth proportional to 1,661.02, 2,291.70 and 952.78 is: 1,314.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.02 : 2,291.70 = 952.78 : x
  2. Step 2: Convert to fraction form
    1,661.02/2,291.70 = 952.78/x
  3. Step 3: Cross multiply
    1,661.02x = 2,291.70 × 952.78
  4. Step 4: Simplify right side
    1,661.02x = 2,183,485.93
  5. Step 5: Solve for x
    x = 2,183,485.93/1,661.02
  6. Step 6: Final answer
    x = 1,314.55

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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.