Home / 2,148.80-3,223.20-1,630.40

Finding the Fourth Proportional to 2,148.80, 3,223.20 and 1,630.40

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Solution

The fourth proportional to 2,148.80, 3,223.20 and 1,630.40 is: 2,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.80 : 3,223.20 = 1,630.40 : x
  2. Step 2: Convert to fraction form
    2,148.80/3,223.20 = 1,630.40/x
  3. Step 3: Cross multiply
    2,148.80x = 3,223.20 × 1,630.40
  4. Step 4: Simplify right side
    2,148.80x = 5,255,105.28
  5. Step 5: Solve for x
    x = 5,255,105.28/2,148.80
  6. Step 6: Final answer
    x = 2,445.60

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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.