Home / 859,801.20-1,289,712.60-260,768.40

Finding the Fourth Proportional to 859,801.20, 1,289,712.60 and 260,768.40

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Solution

The fourth proportional to 859,801.20, 1,289,712.60 and 260,768.40 is: 391,155.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,801.20 : 1,289,712.60 = 260,768.40 : x
  2. Step 2: Convert to fraction form
    859,801.20/1,289,712.60 = 260,768.40/x
  3. Step 3: Cross multiply
    859,801.20x = 1,289,712.60 × 260,768.40
  4. Step 4: Simplify right side
    859,801.20x = 336,316,291,161.84
  5. Step 5: Solve for x
    x = 336,316,291,161.84/859,801.20
  6. Step 6: Final answer
    x = 391,155.88

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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.