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Finding the Fourth Proportional to 403,374.40, 605,061.60 and 263,291.20

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Solution

The fourth proportional to 403,374.40, 605,061.60 and 263,291.20 is: 394,936.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,374.40 : 605,061.60 = 263,291.20 : x
  2. Step 2: Convert to fraction form
    403,374.40/605,061.60 = 263,291.20/x
  3. Step 3: Cross multiply
    403,374.40x = 605,061.60 × 263,291.20
  4. Step 4: Simplify right side
    403,374.40x = 159,307,394,737.92
  5. Step 5: Solve for x
    x = 159,307,394,737.92/403,374.40
  6. Step 6: Final answer
    x = 394,936.80

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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.