Home / 859,679.20-1,289,529.60-260,646.40

Finding the Fourth Proportional to 859,679.20, 1,289,529.60 and 260,646.40

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Solution

The fourth proportional to 859,679.20, 1,289,529.60 and 260,646.40 is: 390,972.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,679.20 : 1,289,529.60 = 260,646.40 : x
  2. Step 2: Convert to fraction form
    859,679.20/1,289,529.60 = 260,646.40/x
  3. Step 3: Cross multiply
    859,679.20x = 1,289,529.60 × 260,646.40
  4. Step 4: Simplify right side
    859,679.20x = 336,111,247,933.44
  5. Step 5: Solve for x
    x = 336,111,247,933.44/859,679.20
  6. Step 6: Final answer
    x = 390,972.87

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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.