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Finding the Fourth Proportional to 1,904.40, 2,857.66 and 930.51

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Solution

The fourth proportional to 1,904.40, 2,857.66 and 930.51 is: 1,396.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.40 : 2,857.66 = 930.51 : x
  2. Step 2: Convert to fraction form
    1,904.40/2,857.66 = 930.51/x
  3. Step 3: Cross multiply
    1,904.40x = 2,857.66 × 930.51
  4. Step 4: Simplify right side
    1,904.40x = 2,659,078.88
  5. Step 5: Solve for x
    x = 2,659,078.88/1,904.40
  6. Step 6: Final answer
    x = 1,396.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.