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Finding the Fourth Proportional to 326,872.20, 488,996.10 and 282,986.40

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Solution

The fourth proportional to 326,872.20, 488,996.10 and 282,986.40 is: 423,343.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,872.20 : 488,996.10 = 282,986.40 : x
  2. Step 2: Convert to fraction form
    326,872.20/488,996.10 = 282,986.40/x
  3. Step 3: Cross multiply
    326,872.20x = 488,996.10 × 282,986.40
  4. Step 4: Simplify right side
    326,872.20x = 138,379,245,953.04
  5. Step 5: Solve for x
    x = 138,379,245,953.04/326,872.20
  6. Step 6: Final answer
    x = 423,343.58

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1.5x scale

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.