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Finding the Fourth Proportional to 385,791.36, 578,682.72 and 136,415.04

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Solution

The fourth proportional to 385,791.36, 578,682.72 and 136,415.04 is: 204,621.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,791.36 : 578,682.72 = 136,415.04 : x
  2. Step 2: Convert to fraction form
    385,791.36/578,682.72 = 136,415.04/x
  3. Step 3: Cross multiply
    385,791.36x = 578,682.72 × 136,415.04
  4. Step 4: Simplify right side
    385,791.36x = 78,941,026,396.11
  5. Step 5: Solve for x
    x = 78,941,026,396.11/385,791.36
  6. Step 6: Final answer
    x = 204,621.03

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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.