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Finding the Fourth Proportional to 371,459.90, 557,183.37 and 90,979.58

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Solution

The fourth proportional to 371,459.90, 557,183.37 and 90,979.58 is: 136,467.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,459.90 : 557,183.37 = 90,979.58 : x
  2. Step 2: Convert to fraction form
    371,459.90/557,183.37 = 90,979.58/x
  3. Step 3: Cross multiply
    371,459.90x = 557,183.37 × 90,979.58
  4. Step 4: Simplify right side
    371,459.90x = 50,692,308,985.58
  5. Step 5: Solve for x
    x = 50,692,308,985.58/371,459.90
  6. Step 6: Final answer
    x = 136,467.78

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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.