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Finding the Fourth Proportional to 378,880.44, 522,852.50 and 209,114.58

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Solution

The fourth proportional to 378,880.44, 522,852.50 and 209,114.58 is: 288,576.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,880.44 : 522,852.50 = 209,114.58 : x
  2. Step 2: Convert to fraction form
    378,880.44/522,852.50 = 209,114.58/x
  3. Step 3: Cross multiply
    378,880.44x = 522,852.50 × 209,114.58
  4. Step 4: Simplify right side
    378,880.44x = 109,336,080,939.45
  5. Step 5: Solve for x
    x = 109,336,080,939.45/378,880.44
  6. Step 6: Final answer
    x = 288,576.74

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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.