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Finding the Fourth Proportional to 299,853.90, 449,780.85 and 78,237.90

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Solution

The fourth proportional to 299,853.90, 449,780.85 and 78,237.90 is: 117,356.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,853.90 : 449,780.85 = 78,237.90 : x
  2. Step 2: Convert to fraction form
    299,853.90/449,780.85 = 78,237.90/x
  3. Step 3: Cross multiply
    299,853.90x = 449,780.85 × 78,237.90
  4. Step 4: Simplify right side
    299,853.90x = 35,189,909,164.22
  5. Step 5: Solve for x
    x = 35,189,909,164.22/299,853.90
  6. Step 6: Final answer
    x = 117,356.85

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1.5x scale

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.