Home / 499,921.54-689,874.57-285,130.81

Finding the Fourth Proportional to 499,921.54, 689,874.57 and 285,130.81

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Solution

The fourth proportional to 499,921.54, 689,874.57 and 285,130.81 is: 393,470.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,921.54 : 689,874.57 = 285,130.81 : x
  2. Step 2: Convert to fraction form
    499,921.54/689,874.57 = 285,130.81/x
  3. Step 3: Cross multiply
    499,921.54x = 689,874.57 × 285,130.81
  4. Step 4: Simplify right side
    499,921.54x = 196,704,494,942.50
  5. Step 5: Solve for x
    x = 196,704,494,942.50/499,921.54
  6. Step 6: Final answer
    x = 393,470.73

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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.