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Finding the Fourth Proportional to 403,219.40, 604,829.10 and 396,998.60

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Solution

The fourth proportional to 403,219.40, 604,829.10 and 396,998.60 is: 595,497.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,219.40 : 604,829.10 = 396,998.60 : x
  2. Step 2: Convert to fraction form
    403,219.40/604,829.10 = 396,998.60/x
  3. Step 3: Cross multiply
    403,219.40x = 604,829.10 × 396,998.60
  4. Step 4: Simplify right side
    403,219.40x = 240,116,305,939.26
  5. Step 5: Solve for x
    x = 240,116,305,939.26/403,219.40
  6. Step 6: Final answer
    x = 595,497.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.