Home / 378,671.28-522,566.34-208,905.40

Finding the Fourth Proportional to 378,671.28, 522,566.34 and 208,905.40

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Solution

The fourth proportional to 378,671.28, 522,566.34 and 208,905.40 is: 288,289.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,671.28 : 522,566.34 = 208,905.40 : x
  2. Step 2: Convert to fraction form
    378,671.28/522,566.34 = 208,905.40/x
  3. Step 3: Cross multiply
    378,671.28x = 522,566.34 × 208,905.40
  4. Step 4: Simplify right side
    378,671.28x = 109,166,930,284.24
  5. Step 5: Solve for x
    x = 109,166,930,284.24/378,671.28
  6. Step 6: Final answer
    x = 288,289.44

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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.