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Finding the Fourth Proportional to 455,195.45, 638,206.75 and 455,195.45

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Solution

The fourth proportional to 455,195.45, 638,206.75 and 455,195.45 is: 638,206.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,195.45 : 638,206.75 = 455,195.45 : x
  2. Step 2: Convert to fraction form
    455,195.45/638,206.75 = 455,195.45/x
  3. Step 3: Cross multiply
    455,195.45x = 638,206.75 × 455,195.45
  4. Step 4: Simplify right side
    455,195.45x = 290,508,808,759.29
  5. Step 5: Solve for x
    x = 290,508,808,759.29/455,195.45
  6. Step 6: Final answer
    x = 638,206.75

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.