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Finding the Fourth Proportional to 260,307.93, 390,498.93 and 80,408.64

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Solution

The fourth proportional to 260,307.93, 390,498.93 and 80,408.64 is: 120,624.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,307.93 : 390,498.93 = 80,408.64 : x
  2. Step 2: Convert to fraction form
    260,307.93/390,498.93 = 80,408.64/x
  3. Step 3: Cross multiply
    260,307.93x = 390,498.93 × 80,408.64
  4. Step 4: Simplify right side
    260,307.93x = 31,399,489,129.09
  5. Step 5: Solve for x
    x = 31,399,489,129.09/260,307.93
  6. Step 6: Final answer
    x = 120,624.40

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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.