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Finding the Fourth Proportional to 322,405.64, 483,554.46 and 85,751.72

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Solution

The fourth proportional to 322,405.64, 483,554.46 and 85,751.72 is: 128,613.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,405.64 : 483,554.46 = 85,751.72 : x
  2. Step 2: Convert to fraction form
    322,405.64/483,554.46 = 85,751.72/x
  3. Step 3: Cross multiply
    322,405.64x = 483,554.46 × 85,751.72
  4. Step 4: Simplify right side
    322,405.64x = 41,465,626,658.67
  5. Step 5: Solve for x
    x = 41,465,626,658.67/322,405.64
  6. Step 6: Final answer
    x = 128,613.22

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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.