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Finding the Fourth Proportional to 1,886.92, 2,602.74 and 1,187.08

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Solution

The fourth proportional to 1,886.92, 2,602.74 and 1,187.08 is: 1,637.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.92 : 2,602.74 = 1,187.08 : x
  2. Step 2: Convert to fraction form
    1,886.92/2,602.74 = 1,187.08/x
  3. Step 3: Cross multiply
    1,886.92x = 2,602.74 × 1,187.08
  4. Step 4: Simplify right side
    1,886.92x = 3,089,660.60
  5. Step 5: Solve for x
    x = 3,089,660.60/1,886.92
  6. Step 6: Final answer
    x = 1,637.41

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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.