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Finding the Fourth Proportional to 1,368.80, 1,890.96 and 1,265.12

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Solution

The fourth proportional to 1,368.80, 1,890.96 and 1,265.12 is: 1,747.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.80 : 1,890.96 = 1,265.12 : x
  2. Step 2: Convert to fraction form
    1,368.80/1,890.96 = 1,265.12/x
  3. Step 3: Cross multiply
    1,368.80x = 1,890.96 × 1,265.12
  4. Step 4: Simplify right side
    1,368.80x = 2,392,291.32
  5. Step 5: Solve for x
    x = 2,392,291.32/1,368.80
  6. Step 6: Final answer
    x = 1,747.73

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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.