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Finding the Fourth Proportional to 2,158,899.72, 2,978,032.62 and 1,394,953.26

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Solution

The fourth proportional to 2,158,899.72, 2,978,032.62 and 1,394,953.26 is: 1,924,228.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158,899.72 : 2,978,032.62 = 1,394,953.26 : x
  2. Step 2: Convert to fraction form
    2,158,899.72/2,978,032.62 = 1,394,953.26/x
  3. Step 3: Cross multiply
    2,158,899.72x = 2,978,032.62 × 1,394,953.26
  4. Step 4: Simplify right side
    2,158,899.72x = 4,154,216,311,655.34
  5. Step 5: Solve for x
    x = 4,154,216,311,655.34/2,158,899.72
  6. Step 6: Final answer
    x = 1,924,228.47

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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.