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Finding the Fourth Proportional to 279,886.40, 419,560.80 and 92,801.60

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Solution

The fourth proportional to 279,886.40, 419,560.80 and 92,801.60 is: 139,113.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,886.40 : 419,560.80 = 92,801.60 : x
  2. Step 2: Convert to fraction form
    279,886.40/419,560.80 = 92,801.60/x
  3. Step 3: Cross multiply
    279,886.40x = 419,560.80 × 92,801.60
  4. Step 4: Simplify right side
    279,886.40x = 38,935,913,537.28
  5. Step 5: Solve for x
    x = 38,935,913,537.28/279,886.40
  6. Step 6: Final answer
    x = 139,113.27

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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.