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Finding the Fourth Proportional to 455,200.20, 638,213.40 and 455,200.20

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Solution

The fourth proportional to 455,200.20, 638,213.40 and 455,200.20 is: 638,213.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,200.20 : 638,213.40 = 455,200.20 : x
  2. Step 2: Convert to fraction form
    455,200.20/638,213.40 = 455,200.20/x
  3. Step 3: Cross multiply
    455,200.20x = 638,213.40 × 455,200.20
  4. Step 4: Simplify right side
    455,200.20x = 290,514,867,322.68
  5. Step 5: Solve for x
    x = 290,514,867,322.68/455,200.20
  6. Step 6: Final answer
    x = 638,213.40

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1.5x scale

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.