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Finding the Fourth Proportional to 1,886.26, 2,602.80 and 1,078.69

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Solution

The fourth proportional to 1,886.26, 2,602.80 and 1,078.69 is: 1,488.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.26 : 2,602.80 = 1,078.69 : x
  2. Step 2: Convert to fraction form
    1,886.26/2,602.80 = 1,078.69/x
  3. Step 3: Cross multiply
    1,886.26x = 2,602.80 × 1,078.69
  4. Step 4: Simplify right side
    1,886.26x = 2,807,614.33
  5. Step 5: Solve for x
    x = 2,807,614.33/1,886.26
  6. Step 6: Final answer
    x = 1,488.46

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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.