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Finding the Fourth Proportional to 499,364.82, 688,660.25 and 317,887.56

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Solution

The fourth proportional to 499,364.82, 688,660.25 and 317,887.56 is: 438,389.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,364.82 : 688,660.25 = 317,887.56 : x
  2. Step 2: Convert to fraction form
    499,364.82/688,660.25 = 317,887.56/x
  3. Step 3: Cross multiply
    499,364.82x = 688,660.25 × 317,887.56
  4. Step 4: Simplify right side
    499,364.82x = 218,916,524,952.05
  5. Step 5: Solve for x
    x = 218,916,524,952.05/499,364.82
  6. Step 6: Final answer
    x = 438,389.96

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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.