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Finding the Fourth Proportional to 298,344.56, 447,531.59 and 85,143.89

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Solution

The fourth proportional to 298,344.56, 447,531.59 and 85,143.89 is: 127,720.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,344.56 : 447,531.59 = 85,143.89 : x
  2. Step 2: Convert to fraction form
    298,344.56/447,531.59 = 85,143.89/x
  3. Step 3: Cross multiply
    298,344.56x = 447,531.59 × 85,143.89
  4. Step 4: Simplify right side
    298,344.56x = 38,104,580,044.77
  5. Step 5: Solve for x
    x = 38,104,580,044.77/298,344.56
  6. Step 6: Final answer
    x = 127,720.05

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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.