Home / 1,355.20-2,024.27-1,209.40

Finding the Fourth Proportional to 1,355.20, 2,024.27 and 1,209.40

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Solution

The fourth proportional to 1,355.20, 2,024.27 and 1,209.40 is: 1,806.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.20 : 2,024.27 = 1,209.40 : x
  2. Step 2: Convert to fraction form
    1,355.20/2,024.27 = 1,209.40/x
  3. Step 3: Cross multiply
    1,355.20x = 2,024.27 × 1,209.40
  4. Step 4: Simplify right side
    1,355.20x = 2,448,152.14
  5. Step 5: Solve for x
    x = 2,448,152.14/1,355.20
  6. Step 6: Final answer
    x = 1,806.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.