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Finding the Fourth Proportional to 403,207.20, 604,810.80 and 261,489.60

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Solution

The fourth proportional to 403,207.20, 604,810.80 and 261,489.60 is: 392,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,207.20 : 604,810.80 = 261,489.60 : x
  2. Step 2: Convert to fraction form
    403,207.20/604,810.80 = 261,489.60/x
  3. Step 3: Cross multiply
    403,207.20x = 604,810.80 × 261,489.60
  4. Step 4: Simplify right side
    403,207.20x = 158,151,734,167.68
  5. Step 5: Solve for x
    x = 158,151,734,167.68/403,207.20
  6. Step 6: Final answer
    x = 392,234.40

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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.