Home / 1,248.20-1,868.70-1,118.60

Finding the Fourth Proportional to 1,248.20, 1,868.70 and 1,118.60

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Solution

The fourth proportional to 1,248.20, 1,868.70 and 1,118.60 is: 1,674.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.20 : 1,868.70 = 1,118.60 : x
  2. Step 2: Convert to fraction form
    1,248.20/1,868.70 = 1,118.60/x
  3. Step 3: Cross multiply
    1,248.20x = 1,868.70 × 1,118.60
  4. Step 4: Simplify right side
    1,248.20x = 2,090,327.82
  5. Step 5: Solve for x
    x = 2,090,327.82/1,248.20
  6. Step 6: Final answer
    x = 1,674.67

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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.