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Finding the Fourth Proportional to 499,604.71, 689,453.28 and 281,812.65

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Solution

The fourth proportional to 499,604.71, 689,453.28 and 281,812.65 is: 388,900.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,604.71 : 689,453.28 = 281,812.65 : x
  2. Step 2: Convert to fraction form
    499,604.71/689,453.28 = 281,812.65/x
  3. Step 3: Cross multiply
    499,604.71x = 689,453.28 × 281,812.65
  4. Step 4: Simplify right side
    499,604.71x = 194,296,655,887.99
  5. Step 5: Solve for x
    x = 194,296,655,887.99/499,604.71
  6. Step 6: Final answer
    x = 388,900.77

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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.