Home / 1,919.86-2,648.95-1,080.40

Finding the Fourth Proportional to 1,919.86, 2,648.95 and 1,080.40

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Solution

The fourth proportional to 1,919.86, 2,648.95 and 1,080.40 is: 1,490.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.86 : 2,648.95 = 1,080.40 : x
  2. Step 2: Convert to fraction form
    1,919.86/2,648.95 = 1,080.40/x
  3. Step 3: Cross multiply
    1,919.86x = 2,648.95 × 1,080.40
  4. Step 4: Simplify right side
    1,919.86x = 2,861,916.26
  5. Step 5: Solve for x
    x = 2,861,916.26/1,919.86
  6. Step 6: Final answer
    x = 1,490.69

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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.