Home / 2,798.40-4,194.60-947.80

Finding the Fourth Proportional to 2,798.40, 4,194.60 and 947.80

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Solution

The fourth proportional to 2,798.40, 4,194.60 and 947.80 is: 1,420.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.40 : 4,194.60 = 947.80 : x
  2. Step 2: Convert to fraction form
    2,798.40/4,194.60 = 947.80/x
  3. Step 3: Cross multiply
    2,798.40x = 4,194.60 × 947.80
  4. Step 4: Simplify right side
    2,798.40x = 3,975,641.88
  5. Step 5: Solve for x
    x = 3,975,641.88/2,798.40
  6. Step 6: Final answer
    x = 1,420.68

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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.