Home / 1,262.19-1,890.34-1,218.40

Finding the Fourth Proportional to 1,262.19, 1,890.34 and 1,218.40

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Solution

The fourth proportional to 1,262.19, 1,890.34 and 1,218.40 is: 1,824.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.19 : 1,890.34 = 1,218.40 : x
  2. Step 2: Convert to fraction form
    1,262.19/1,890.34 = 1,218.40/x
  3. Step 3: Cross multiply
    1,262.19x = 1,890.34 × 1,218.40
  4. Step 4: Simplify right side
    1,262.19x = 2,303,189.34
  5. Step 5: Solve for x
    x = 2,303,189.34/1,262.19
  6. Step 6: Final answer
    x = 1,824.76

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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.