Home / 2,919.64-4,030.64-1,980.40

Finding the Fourth Proportional to 2,919.64, 4,030.64 and 1,980.40

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Solution

The fourth proportional to 2,919.64, 4,030.64 and 1,980.40 is: 2,733.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.64 : 4,030.64 = 1,980.40 : x
  2. Step 2: Convert to fraction form
    2,919.64/4,030.64 = 1,980.40/x
  3. Step 3: Cross multiply
    2,919.64x = 4,030.64 × 1,980.40
  4. Step 4: Simplify right side
    2,919.64x = 7,982,279.46
  5. Step 5: Solve for x
    x = 7,982,279.46/2,919.64
  6. Step 6: Final answer
    x = 2,733.99

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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.