Home / 1,409.20-2,124.24-1,286.18

Finding the Fourth Proportional to 1,409.20, 2,124.24 and 1,286.18

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Solution

The fourth proportional to 1,409.20, 2,124.24 and 1,286.18 is: 1,938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.20 : 2,124.24 = 1,286.18 : x
  2. Step 2: Convert to fraction form
    1,409.20/2,124.24 = 1,286.18/x
  3. Step 3: Cross multiply
    1,409.20x = 2,124.24 × 1,286.18
  4. Step 4: Simplify right side
    1,409.20x = 2,732,155.00
  5. Step 5: Solve for x
    x = 2,732,155.00/1,409.20
  6. Step 6: Final answer
    x = 1,938.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.