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Finding the Fourth Proportional to 455,341.20, 638,410.80 and 455,341.20

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Solution

The fourth proportional to 455,341.20, 638,410.80 and 455,341.20 is: 638,410.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,341.20 : 638,410.80 = 455,341.20 : x
  2. Step 2: Convert to fraction form
    455,341.20/638,410.80 = 455,341.20/x
  3. Step 3: Cross multiply
    455,341.20x = 638,410.80 × 455,341.20
  4. Step 4: Simplify right side
    455,341.20x = 290,694,739,764.96
  5. Step 5: Solve for x
    x = 290,694,739,764.96/455,341.20
  6. Step 6: Final answer
    x = 638,410.80

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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.