Home / 1,949.40-2,690.28-1,427.76

Finding the Fourth Proportional to 1,949.40, 2,690.28 and 1,427.76

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Solution

The fourth proportional to 1,949.40, 2,690.28 and 1,427.76 is: 1,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.40 : 2,690.28 = 1,427.76 : x
  2. Step 2: Convert to fraction form
    1,949.40/2,690.28 = 1,427.76/x
  3. Step 3: Cross multiply
    1,949.40x = 2,690.28 × 1,427.76
  4. Step 4: Simplify right side
    1,949.40x = 3,841,074.17
  5. Step 5: Solve for x
    x = 3,841,074.17/1,949.40
  6. Step 6: Final answer
    x = 1,970.39

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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.