Home / 2,124.40-2,931.20-1,627.60

Finding the Fourth Proportional to 2,124.40, 2,931.20 and 1,627.60

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Solution

The fourth proportional to 2,124.40, 2,931.20 and 1,627.60 is: 2,245.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.40 : 2,931.20 = 1,627.60 : x
  2. Step 2: Convert to fraction form
    2,124.40/2,931.20 = 1,627.60/x
  3. Step 3: Cross multiply
    2,124.40x = 2,931.20 × 1,627.60
  4. Step 4: Simplify right side
    2,124.40x = 4,770,821.12
  5. Step 5: Solve for x
    x = 4,770,821.12/2,124.40
  6. Step 6: Final answer
    x = 2,245.73

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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.