Home / 2,509.90-3,463.61-1,390.84

Finding the Fourth Proportional to 2,509.90, 3,463.61 and 1,390.84

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Solution

The fourth proportional to 2,509.90, 3,463.61 and 1,390.84 is: 1,919.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,509.90 : 3,463.61 = 1,390.84 : x
  2. Step 2: Convert to fraction form
    2,509.90/3,463.61 = 1,390.84/x
  3. Step 3: Cross multiply
    2,509.90x = 3,463.61 × 1,390.84
  4. Step 4: Simplify right side
    2,509.90x = 4,817,311.72
  5. Step 5: Solve for x
    x = 4,817,311.72/2,509.90
  6. Step 6: Final answer
    x = 1,919.33

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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.