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Finding the Fourth Proportional to 280,628.70, 421,085.20 and 122,858.52

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Solution

The fourth proportional to 280,628.70, 421,085.20 and 122,858.52 is: 184,350.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,628.70 : 421,085.20 = 122,858.52 : x
  2. Step 2: Convert to fraction form
    280,628.70/421,085.20 = 122,858.52/x
  3. Step 3: Cross multiply
    280,628.70x = 421,085.20 × 122,858.52
  4. Step 4: Simplify right side
    280,628.70x = 51,733,904,465.90
  5. Step 5: Solve for x
    x = 51,733,904,465.90/280,628.70
  6. Step 6: Final answer
    x = 184,350.01

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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.