Home / 2,428.60-3,640.68-1,111.68

Finding the Fourth Proportional to 2,428.60, 3,640.68 and 1,111.68

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Solution

The fourth proportional to 2,428.60, 3,640.68 and 1,111.68 is: 1,666.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.60 : 3,640.68 = 1,111.68 : x
  2. Step 2: Convert to fraction form
    2,428.60/3,640.68 = 1,111.68/x
  3. Step 3: Cross multiply
    2,428.60x = 3,640.68 × 1,111.68
  4. Step 4: Simplify right side
    2,428.60x = 4,047,271.14
  5. Step 5: Solve for x
    x = 4,047,271.14/2,428.60
  6. Step 6: Final answer
    x = 1,666.50

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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.