Home / 2,292.80-3,442.40-1,428.80

Finding the Fourth Proportional to 2,292.80, 3,442.40 and 1,428.80

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Solution

The fourth proportional to 2,292.80, 3,442.40 and 1,428.80 is: 2,145.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,292.80 : 3,442.40 = 1,428.80 : x
  2. Step 2: Convert to fraction form
    2,292.80/3,442.40 = 1,428.80/x
  3. Step 3: Cross multiply
    2,292.80x = 3,442.40 × 1,428.80
  4. Step 4: Simplify right side
    2,292.80x = 4,918,501.12
  5. Step 5: Solve for x
    x = 4,918,501.12/2,292.80
  6. Step 6: Final answer
    x = 2,145.19

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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.