Home / 280,619.60-420,929.40-83,627.60

Finding the Fourth Proportional to 280,619.60, 420,929.40 and 83,627.60

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Solution

The fourth proportional to 280,619.60, 420,929.40 and 83,627.60 is: 125,441.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,619.60 : 420,929.40 = 83,627.60 : x
  2. Step 2: Convert to fraction form
    280,619.60/420,929.40 = 83,627.60/x
  3. Step 3: Cross multiply
    280,619.60x = 420,929.40 × 83,627.60
  4. Step 4: Simplify right side
    280,619.60x = 35,201,315,491.44
  5. Step 5: Solve for x
    x = 35,201,315,491.44/280,619.60
  6. Step 6: Final answer
    x = 125,441.40

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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.