Home / 859,639.20-1,289,469.60-260,606.40

Finding the Fourth Proportional to 859,639.20, 1,289,469.60 and 260,606.40

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Solution

The fourth proportional to 859,639.20, 1,289,469.60 and 260,606.40 is: 390,912.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,639.20 : 1,289,469.60 = 260,606.40 : x
  2. Step 2: Convert to fraction form
    859,639.20/1,289,469.60 = 260,606.40/x
  3. Step 3: Cross multiply
    859,639.20x = 1,289,469.60 × 260,606.40
  4. Step 4: Simplify right side
    859,639.20x = 336,044,030,365.44
  5. Step 5: Solve for x
    x = 336,044,030,365.44/859,639.20
  6. Step 6: Final answer
    x = 390,912.87

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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.