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Finding the Fourth Proportional to 1,860.90, 2,789.18 and 1,369.40

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Solution

The fourth proportional to 1,860.90, 2,789.18 and 1,369.40 is: 2,052.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.90 : 2,789.18 = 1,369.40 : x
  2. Step 2: Convert to fraction form
    1,860.90/2,789.18 = 1,369.40/x
  3. Step 3: Cross multiply
    1,860.90x = 2,789.18 × 1,369.40
  4. Step 4: Simplify right side
    1,860.90x = 3,819,503.09
  5. Step 5: Solve for x
    x = 3,819,503.09/1,860.90
  6. Step 6: Final answer
    x = 2,052.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.