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Finding the Fourth Proportional to 7,238,978.60, 9,987,290.34 and 4,627,010.48

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Solution

The fourth proportional to 7,238,978.60, 9,987,290.34 and 4,627,010.48 is: 6,383,676.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,238,978.60 : 9,987,290.34 = 4,627,010.48 : x
  2. Step 2: Convert to fraction form
    7,238,978.60/9,987,290.34 = 4,627,010.48/x
  3. Step 3: Cross multiply
    7,238,978.60x = 9,987,290.34 × 4,627,010.48
  4. Step 4: Simplify right side
    7,238,978.60x = 46,211,297,069,982.77
  5. Step 5: Solve for x
    x = 46,211,297,069,982.77/7,238,978.60
  6. Step 6: Final answer
    x = 6,383,676.43

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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.