Home / 2,890.19-4,338.27-1,780.40

Finding the Fourth Proportional to 2,890.19, 4,338.27 and 1,780.40

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Solution

The fourth proportional to 2,890.19, 4,338.27 and 1,780.40 is: 2,672.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.19 : 4,338.27 = 1,780.40 : x
  2. Step 2: Convert to fraction form
    2,890.19/4,338.27 = 1,780.40/x
  3. Step 3: Cross multiply
    2,890.19x = 4,338.27 × 1,780.40
  4. Step 4: Simplify right side
    2,890.19x = 7,723,855.91
  5. Step 5: Solve for x
    x = 7,723,855.91/2,890.19
  6. Step 6: Final answer
    x = 2,672.44

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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.