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Finding the Fourth Proportional to 1,888.99, 2,606.08 and 1,392.81

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Solution

The fourth proportional to 1,888.99, 2,606.08 and 1,392.81 is: 1,921.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,888.99 : 2,606.08 = 1,392.81 : x
  2. Step 2: Convert to fraction form
    1,888.99/2,606.08 = 1,392.81/x
  3. Step 3: Cross multiply
    1,888.99x = 2,606.08 × 1,392.81
  4. Step 4: Simplify right side
    1,888.99x = 3,629,774.28
  5. Step 5: Solve for x
    x = 3,629,774.28/1,888.99
  6. Step 6: Final answer
    x = 1,921.54

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1.5x scale

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.