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Finding the Fourth Proportional to 398,094.48, 550,069.56 and 318,181.32

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Solution

The fourth proportional to 398,094.48, 550,069.56 and 318,181.32 is: 439,649.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,094.48 : 550,069.56 = 318,181.32 : x
  2. Step 2: Convert to fraction form
    398,094.48/550,069.56 = 318,181.32/x
  3. Step 3: Cross multiply
    398,094.48x = 550,069.56 × 318,181.32
  4. Step 4: Simplify right side
    398,094.48x = 175,021,858,692.62
  5. Step 5: Solve for x
    x = 175,021,858,692.62/398,094.48
  6. Step 6: Final answer
    x = 439,649.05

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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.