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Finding the Fourth Proportional to 1,985,054.22, 2,977,876.56 and 920,203.92

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Solution

The fourth proportional to 1,985,054.22, 2,977,876.56 and 920,203.92 is: 1,380,442.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985,054.22 : 2,977,876.56 = 920,203.92 : x
  2. Step 2: Convert to fraction form
    1,985,054.22/2,977,876.56 = 920,203.92/x
  3. Step 3: Cross multiply
    1,985,054.22x = 2,977,876.56 × 920,203.92
  4. Step 4: Simplify right side
    1,985,054.22x = 2,740,253,683,788.12
  5. Step 5: Solve for x
    x = 2,740,253,683,788.12/1,985,054.22
  6. Step 6: Final answer
    x = 1,380,442.74

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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.