Home / 1,211.79-1,815.48-1,166.79

Finding the Fourth Proportional to 1,211.79, 1,815.48 and 1,166.79

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Solution

The fourth proportional to 1,211.79, 1,815.48 and 1,166.79 is: 1,748.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.79 : 1,815.48 = 1,166.79 : x
  2. Step 2: Convert to fraction form
    1,211.79/1,815.48 = 1,166.79/x
  3. Step 3: Cross multiply
    1,211.79x = 1,815.48 × 1,166.79
  4. Step 4: Simplify right side
    1,211.79x = 2,118,283.91
  5. Step 5: Solve for x
    x = 2,118,283.91/1,211.79
  6. Step 6: Final answer
    x = 1,748.06

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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.