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Finding the Fourth Proportional to 1,792.40, 2,690.90 and 1,381.82

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Solution

The fourth proportional to 1,792.40, 2,690.90 and 1,381.82 is: 2,074.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.40 : 2,690.90 = 1,381.82 : x
  2. Step 2: Convert to fraction form
    1,792.40/2,690.90 = 1,381.82/x
  3. Step 3: Cross multiply
    1,792.40x = 2,690.90 × 1,381.82
  4. Step 4: Simplify right side
    1,792.40x = 3,718,319.07
  5. Step 5: Solve for x
    x = 3,718,319.07/1,792.40
  6. Step 6: Final answer
    x = 2,074.50

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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.