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Finding the Fourth Proportional to 491,593.63, 678,499.70 and 310,183.35

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Solution

The fourth proportional to 491,593.63, 678,499.70 and 310,183.35 is: 428,116.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,593.63 : 678,499.70 = 310,183.35 : x
  2. Step 2: Convert to fraction form
    491,593.63/678,499.70 = 310,183.35/x
  3. Step 3: Cross multiply
    491,593.63x = 678,499.70 × 310,183.35
  4. Step 4: Simplify right side
    491,593.63x = 210,459,309,920.00
  5. Step 5: Solve for x
    x = 210,459,309,920.00/491,593.63
  6. Step 6: Final answer
    x = 428,116.43

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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.