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Finding the Fourth Proportional to 455,999.10, 638,865.30 and 455,999.10

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Solution

The fourth proportional to 455,999.10, 638,865.30 and 455,999.10 is: 638,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,999.10 : 638,865.30 = 455,999.10 : x
  2. Step 2: Convert to fraction form
    455,999.10/638,865.30 = 455,999.10/x
  3. Step 3: Cross multiply
    455,999.10x = 638,865.30 × 455,999.10
  4. Step 4: Simplify right side
    455,999.10x = 291,322,001,821.23
  5. Step 5: Solve for x
    x = 291,322,001,821.23/455,999.10
  6. Step 6: Final answer
    x = 638,865.30

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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.