Home / 1,780.36-2,668.10-1,000.74

Finding the Fourth Proportional to 1,780.36, 2,668.10 and 1,000.74

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Solution

The fourth proportional to 1,780.36, 2,668.10 and 1,000.74 is: 1,499.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.36 : 2,668.10 = 1,000.74 : x
  2. Step 2: Convert to fraction form
    1,780.36/2,668.10 = 1,000.74/x
  3. Step 3: Cross multiply
    1,780.36x = 2,668.10 × 1,000.74
  4. Step 4: Simplify right side
    1,780.36x = 2,670,074.39
  5. Step 5: Solve for x
    x = 2,670,074.39/1,780.36
  6. Step 6: Final answer
    x = 1,499.74

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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.