Home / 2,128.08-2,930.40-1,778.16

Finding the Fourth Proportional to 2,128.08, 2,930.40 and 1,778.16

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Solution

The fourth proportional to 2,128.08, 2,930.40 and 1,778.16 is: 2,448.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.08 : 2,930.40 = 1,778.16 : x
  2. Step 2: Convert to fraction form
    2,128.08/2,930.40 = 1,778.16/x
  3. Step 3: Cross multiply
    2,128.08x = 2,930.40 × 1,778.16
  4. Step 4: Simplify right side
    2,128.08x = 5,210,720.06
  5. Step 5: Solve for x
    x = 5,210,720.06/2,128.08
  6. Step 6: Final answer
    x = 2,448.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.