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Finding the Fourth Proportional to 614,408.40, 921,742.20 and 259,239.60

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Solution

The fourth proportional to 614,408.40, 921,742.20 and 259,239.60 is: 388,914.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,408.40 : 921,742.20 = 259,239.60 : x
  2. Step 2: Convert to fraction form
    614,408.40/921,742.20 = 259,239.60/x
  3. Step 3: Cross multiply
    614,408.40x = 921,742.20 × 259,239.60
  4. Step 4: Simplify right side
    614,408.40x = 238,952,079,231.12
  5. Step 5: Solve for x
    x = 238,952,079,231.12/614,408.40
  6. Step 6: Final answer
    x = 388,914.08

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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.