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Finding the Fourth Proportional to 389,043.28, 537,059.01 and 274,415.32

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Solution

The fourth proportional to 389,043.28, 537,059.01 and 274,415.32 is: 378,819.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,043.28 : 537,059.01 = 274,415.32 : x
  2. Step 2: Convert to fraction form
    389,043.28/537,059.01 = 274,415.32/x
  3. Step 3: Cross multiply
    389,043.28x = 537,059.01 × 274,415.32
  4. Step 4: Simplify right side
    389,043.28x = 147,377,220,088.03
  5. Step 5: Solve for x
    x = 147,377,220,088.03/389,043.28
  6. Step 6: Final answer
    x = 378,819.60

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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.