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Finding the Fourth Proportional to 455,779.75, 628,988.75 and 251,843.88

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Solution

The fourth proportional to 455,779.75, 628,988.75 and 251,843.88 is: 347,551.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,779.75 : 628,988.75 = 251,843.88 : x
  2. Step 2: Convert to fraction form
    455,779.75/628,988.75 = 251,843.88/x
  3. Step 3: Cross multiply
    455,779.75x = 628,988.75 × 251,843.88
  4. Step 4: Simplify right side
    455,779.75x = 158,406,967,276.35
  5. Step 5: Solve for x
    x = 158,406,967,276.35/455,779.75
  6. Step 6: Final answer
    x = 347,551.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.