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Finding the Fourth Proportional to 299,898.80, 449,848.20 and 78,282.80

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Solution

The fourth proportional to 299,898.80, 449,848.20 and 78,282.80 is: 117,424.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,898.80 : 449,848.20 = 78,282.80 : x
  2. Step 2: Convert to fraction form
    299,898.80/449,848.20 = 78,282.80/x
  3. Step 3: Cross multiply
    299,898.80x = 449,848.20 × 78,282.80
  4. Step 4: Simplify right side
    299,898.80x = 35,215,376,670.96
  5. Step 5: Solve for x
    x = 35,215,376,670.96/299,898.80
  6. Step 6: Final answer
    x = 117,424.20

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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.