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Finding the Fourth Proportional to 303,342.60, 455,013.90 and 256,103.40

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Solution

The fourth proportional to 303,342.60, 455,013.90 and 256,103.40 is: 384,155.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,342.60 : 455,013.90 = 256,103.40 : x
  2. Step 2: Convert to fraction form
    303,342.60/455,013.90 = 256,103.40/x
  3. Step 3: Cross multiply
    303,342.60x = 455,013.90 × 256,103.40
  4. Step 4: Simplify right side
    303,342.60x = 116,530,606,837.26
  5. Step 5: Solve for x
    x = 116,530,606,837.26/303,342.60
  6. Step 6: Final answer
    x = 384,155.10

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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.