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Finding the Fourth Proportional to 455,272.20, 638,314.20 and 455,272.20

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Solution

The fourth proportional to 455,272.20, 638,314.20 and 455,272.20 is: 638,314.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,272.20 : 638,314.20 = 455,272.20 : x
  2. Step 2: Convert to fraction form
    455,272.20/638,314.20 = 455,272.20/x
  3. Step 3: Cross multiply
    455,272.20x = 638,314.20 × 455,272.20
  4. Step 4: Simplify right side
    455,272.20x = 290,606,710,125.24
  5. Step 5: Solve for x
    x = 290,606,710,125.24/455,272.20
  6. Step 6: Final answer
    x = 638,314.20

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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.