Home / 2,790.71-4,186.74-1,970.58

Finding the Fourth Proportional to 2,790.71, 4,186.74 and 1,970.58

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Solution

The fourth proportional to 2,790.71, 4,186.74 and 1,970.58 is: 2,956.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.71 : 4,186.74 = 1,970.58 : x
  2. Step 2: Convert to fraction form
    2,790.71/4,186.74 = 1,970.58/x
  3. Step 3: Cross multiply
    2,790.71x = 4,186.74 × 1,970.58
  4. Step 4: Simplify right side
    2,790.71x = 8,250,306.11
  5. Step 5: Solve for x
    x = 8,250,306.11/2,790.71
  6. Step 6: Final answer
    x = 2,956.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.