Home / 2,830.78-4,246.62-1,187.20

Finding the Fourth Proportional to 2,830.78, 4,246.62 and 1,187.20

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Solution

The fourth proportional to 2,830.78, 4,246.62 and 1,187.20 is: 1,780.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.78 : 4,246.62 = 1,187.20 : x
  2. Step 2: Convert to fraction form
    2,830.78/4,246.62 = 1,187.20/x
  3. Step 3: Cross multiply
    2,830.78x = 4,246.62 × 1,187.20
  4. Step 4: Simplify right side
    2,830.78x = 5,041,587.26
  5. Step 5: Solve for x
    x = 5,041,587.26/2,830.78
  6. Step 6: Final answer
    x = 1,780.99

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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.