Home / 2,269.10-3,128.84-1,428.80

Finding the Fourth Proportional to 2,269.10, 3,128.84 and 1,428.80

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Solution

The fourth proportional to 2,269.10, 3,128.84 and 1,428.80 is: 1,970.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,269.10 : 3,128.84 = 1,428.80 : x
  2. Step 2: Convert to fraction form
    2,269.10/3,128.84 = 1,428.80/x
  3. Step 3: Cross multiply
    2,269.10x = 3,128.84 × 1,428.80
  4. Step 4: Simplify right side
    2,269.10x = 4,470,463.80
  5. Step 5: Solve for x
    x = 4,470,463.80/2,269.10
  6. Step 6: Final answer
    x = 1,970.15

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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.