Home / 2,378.07-3,281.63-1,315.83

Finding the Fourth Proportional to 2,378.07, 3,281.63 and 1,315.83

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Solution

The fourth proportional to 2,378.07, 3,281.63 and 1,315.83 is: 1,815.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.07 : 3,281.63 = 1,315.83 : x
  2. Step 2: Convert to fraction form
    2,378.07/3,281.63 = 1,315.83/x
  3. Step 3: Cross multiply
    2,378.07x = 3,281.63 × 1,315.83
  4. Step 4: Simplify right side
    2,378.07x = 4,318,060.62
  5. Step 5: Solve for x
    x = 4,318,060.62/2,378.07
  6. Step 6: Final answer
    x = 1,815.78

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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.