Home / 2,909.28-4,015.62-1,790.40

Finding the Fourth Proportional to 2,909.28, 4,015.62 and 1,790.40

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Solution

The fourth proportional to 2,909.28, 4,015.62 and 1,790.40 is: 2,471.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909.28 : 4,015.62 = 1,790.40 : x
  2. Step 2: Convert to fraction form
    2,909.28/4,015.62 = 1,790.40/x
  3. Step 3: Cross multiply
    2,909.28x = 4,015.62 × 1,790.40
  4. Step 4: Simplify right side
    2,909.28x = 7,189,566.05
  5. Step 5: Solve for x
    x = 7,189,566.05/2,909.28
  6. Step 6: Final answer
    x = 2,471.25

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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.