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Finding the Fourth Proportional to 403,257.20, 604,885.80 and 261,539.60

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Solution

The fourth proportional to 403,257.20, 604,885.80 and 261,539.60 is: 392,309.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,257.20 : 604,885.80 = 261,539.60 : x
  2. Step 2: Convert to fraction form
    403,257.20/604,885.80 = 261,539.60/x
  3. Step 3: Cross multiply
    403,257.20x = 604,885.80 × 261,539.60
  4. Step 4: Simplify right side
    403,257.20x = 158,201,590,177.68
  5. Step 5: Solve for x
    x = 158,201,590,177.68/403,257.20
  6. Step 6: Final answer
    x = 392,309.40

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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.