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Finding the Fourth Proportional to 303,347.10, 455,020.65 and 256,107.90

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Solution

The fourth proportional to 303,347.10, 455,020.65 and 256,107.90 is: 384,161.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,347.10 : 455,020.65 = 256,107.90 : x
  2. Step 2: Convert to fraction form
    303,347.10/455,020.65 = 256,107.90/x
  3. Step 3: Cross multiply
    303,347.10x = 455,020.65 × 256,107.90
  4. Step 4: Simplify right side
    303,347.10x = 116,534,383,128.14
  5. Step 5: Solve for x
    x = 116,534,383,128.14/303,347.10
  6. Step 6: Final answer
    x = 384,161.85

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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.