Home / 1,678.20-2,518.20-1,435.80

Finding the Fourth Proportional to 1,678.20, 2,518.20 and 1,435.80

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Solution

The fourth proportional to 1,678.20, 2,518.20 and 1,435.80 is: 2,154.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.20 : 2,518.20 = 1,435.80 : x
  2. Step 2: Convert to fraction form
    1,678.20/2,518.20 = 1,435.80/x
  3. Step 3: Cross multiply
    1,678.20x = 2,518.20 × 1,435.80
  4. Step 4: Simplify right side
    1,678.20x = 3,615,631.56
  5. Step 5: Solve for x
    x = 3,615,631.56/1,678.20
  6. Step 6: Final answer
    x = 2,154.47

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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.