Home / 498,836.58-688,621.11-317,796.78

Finding the Fourth Proportional to 498,836.58, 688,621.11 and 317,796.78

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Solution

The fourth proportional to 498,836.58, 688,621.11 and 317,796.78 is: 438,703.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,836.58 : 688,621.11 = 317,796.78 : x
  2. Step 2: Convert to fraction form
    498,836.58/688,621.11 = 317,796.78/x
  3. Step 3: Cross multiply
    498,836.58x = 688,621.11 × 317,796.78
  4. Step 4: Simplify right side
    498,836.58x = 218,841,571,398.03
  5. Step 5: Solve for x
    x = 218,841,571,398.03/498,836.58
  6. Step 6: Final answer
    x = 438,703.94

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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.