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Finding the Fourth Proportional to 498,499.92, 688,321.80 and 401,395.50

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Solution

The fourth proportional to 498,499.92, 688,321.80 and 401,395.50 is: 554,241.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,499.92 : 688,321.80 = 401,395.50 : x
  2. Step 2: Convert to fraction form
    498,499.92/688,321.80 = 401,395.50/x
  3. Step 3: Cross multiply
    498,499.92x = 688,321.80 × 401,395.50
  4. Step 4: Simplify right side
    498,499.92x = 276,289,273,071.90
  5. Step 5: Solve for x
    x = 276,289,273,071.90/498,499.92
  6. Step 6: Final answer
    x = 554,241.36

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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.