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Finding the Fourth Proportional to 371,458.90, 557,181.87 and 90,978.58

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Solution

The fourth proportional to 371,458.90, 557,181.87 and 90,978.58 is: 136,466.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,458.90 : 557,181.87 = 90,978.58 : x
  2. Step 2: Convert to fraction form
    371,458.90/557,181.87 = 90,978.58/x
  3. Step 3: Cross multiply
    371,458.90x = 557,181.87 × 90,978.58
  4. Step 4: Simplify right side
    371,458.90x = 50,691,615,334.34
  5. Step 5: Solve for x
    x = 50,691,615,334.34/371,458.90
  6. Step 6: Final answer
    x = 136,466.28

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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.