Home / 2,639.58-3,643.93-1,520.30

Finding the Fourth Proportional to 2,639.58, 3,643.93 and 1,520.30

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Solution

The fourth proportional to 2,639.58, 3,643.93 and 1,520.30 is: 2,098.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.58 : 3,643.93 = 1,520.30 : x
  2. Step 2: Convert to fraction form
    2,639.58/3,643.93 = 1,520.30/x
  3. Step 3: Cross multiply
    2,639.58x = 3,643.93 × 1,520.30
  4. Step 4: Simplify right side
    2,639.58x = 5,539,873.84
  5. Step 5: Solve for x
    x = 5,539,873.84/2,639.58
  6. Step 6: Final answer
    x = 2,098.77

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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.