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Finding the Fourth Proportional to 305,897.78, 458,912.26 and 128,302.44

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Solution

The fourth proportional to 305,897.78, 458,912.26 and 128,302.44 is: 192,481.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,897.78 : 458,912.26 = 128,302.44 : x
  2. Step 2: Convert to fraction form
    305,897.78/458,912.26 = 128,302.44/x
  3. Step 3: Cross multiply
    305,897.78x = 458,912.26 × 128,302.44
  4. Step 4: Simplify right side
    305,897.78x = 58,879,562,703.91
  5. Step 5: Solve for x
    x = 58,879,562,703.91/305,897.78
  6. Step 6: Final answer
    x = 192,481.17

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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.