Home / 1,629.60-2,254.68-1,423.20

Finding the Fourth Proportional to 1,629.60, 2,254.68 and 1,423.20

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Solution

The fourth proportional to 1,629.60, 2,254.68 and 1,423.20 is: 1,969.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.60 : 2,254.68 = 1,423.20 : x
  2. Step 2: Convert to fraction form
    1,629.60/2,254.68 = 1,423.20/x
  3. Step 3: Cross multiply
    1,629.60x = 2,254.68 × 1,423.20
  4. Step 4: Simplify right side
    1,629.60x = 3,208,860.58
  5. Step 5: Solve for x
    x = 3,208,860.58/1,629.60
  6. Step 6: Final answer
    x = 1,969.11

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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.