Home / 1,226.60-1,839.90-1,210.40

Finding the Fourth Proportional to 1,226.60, 1,839.90 and 1,210.40

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Solution

The fourth proportional to 1,226.60, 1,839.90 and 1,210.40 is: 1,815.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.60 : 1,839.90 = 1,210.40 : x
  2. Step 2: Convert to fraction form
    1,226.60/1,839.90 = 1,210.40/x
  3. Step 3: Cross multiply
    1,226.60x = 1,839.90 × 1,210.40
  4. Step 4: Simplify right side
    1,226.60x = 2,227,014.96
  5. Step 5: Solve for x
    x = 2,227,014.96/1,226.60
  6. Step 6: Final answer
    x = 1,815.60

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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.