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Finding the Fourth Proportional to 499,815.91, 689,028.56 and 356,326.84

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Solution

The fourth proportional to 499,815.91, 689,028.56 and 356,326.84 is: 491,219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,815.91 : 689,028.56 = 356,326.84 : x
  2. Step 2: Convert to fraction form
    499,815.91/689,028.56 = 356,326.84/x
  3. Step 3: Cross multiply
    499,815.91x = 689,028.56 × 356,326.84
  4. Step 4: Simplify right side
    499,815.91x = 245,519,368,934.70
  5. Step 5: Solve for x
    x = 245,519,368,934.70/499,815.91
  6. Step 6: Final answer
    x = 491,219.60

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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.