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Finding the Fourth Proportional to 1,379.38, 1,904.01 and 883.36

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Solution

The fourth proportional to 1,379.38, 1,904.01 and 883.36 is: 1,219.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.38 : 1,904.01 = 883.36 : x
  2. Step 2: Convert to fraction form
    1,379.38/1,904.01 = 883.36/x
  3. Step 3: Cross multiply
    1,379.38x = 1,904.01 × 883.36
  4. Step 4: Simplify right side
    1,379.38x = 1,681,914.63
  5. Step 5: Solve for x
    x = 1,681,914.63/1,379.38
  6. Step 6: Final answer
    x = 1,219.33

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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.