Home / 287,419.50-431,313.78-192,756.60

Finding the Fourth Proportional to 287,419.50, 431,313.78 and 192,756.60

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Solution

The fourth proportional to 287,419.50, 431,313.78 and 192,756.60 is: 289,258.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,419.50 : 431,313.78 = 192,756.60 : x
  2. Step 2: Convert to fraction form
    287,419.50/431,313.78 = 192,756.60/x
  3. Step 3: Cross multiply
    287,419.50x = 431,313.78 × 192,756.60
  4. Step 4: Simplify right side
    287,419.50x = 83,138,577,765.95
  5. Step 5: Solve for x
    x = 83,138,577,765.95/287,419.50
  6. Step 6: Final answer
    x = 289,258.65

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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.