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Finding the Fourth Proportional to 887,978.60, 1,331,093.10 and 438,768.80

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Solution

The fourth proportional to 887,978.60, 1,331,093.10 and 438,768.80 is: 657,720.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,978.60 : 1,331,093.10 = 438,768.80 : x
  2. Step 2: Convert to fraction form
    887,978.60/1,331,093.10 = 438,768.80/x
  3. Step 3: Cross multiply
    887,978.60x = 1,331,093.10 × 438,768.80
  4. Step 4: Simplify right side
    887,978.60x = 584,042,122,175.28
  5. Step 5: Solve for x
    x = 584,042,122,175.28/887,978.60
  6. Step 6: Final answer
    x = 657,720.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.