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Finding the Fourth Proportional to 384,020.80, 576,031.20 and 258,049.60

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Solution

The fourth proportional to 384,020.80, 576,031.20 and 258,049.60 is: 387,074.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,020.80 : 576,031.20 = 258,049.60 : x
  2. Step 2: Convert to fraction form
    384,020.80/576,031.20 = 258,049.60/x
  3. Step 3: Cross multiply
    384,020.80x = 576,031.20 × 258,049.60
  4. Step 4: Simplify right side
    384,020.80x = 148,644,620,747.52
  5. Step 5: Solve for x
    x = 148,644,620,747.52/384,020.80
  6. Step 6: Final answer
    x = 387,074.40

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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.