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Finding the Fourth Proportional to 455,641.88, 628,759.76 and 272,087.58

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Solution

The fourth proportional to 455,641.88, 628,759.76 and 272,087.58 is: 375,465.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,641.88 : 628,759.76 = 272,087.58 : x
  2. Step 2: Convert to fraction form
    455,641.88/628,759.76 = 272,087.58/x
  3. Step 3: Cross multiply
    455,641.88x = 628,759.76 × 272,087.58
  4. Step 4: Simplify right side
    455,641.88x = 171,077,721,499.78
  5. Step 5: Solve for x
    x = 171,077,721,499.78/455,641.88
  6. Step 6: Final answer
    x = 375,465.31

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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.