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Finding the Fourth Proportional to 447,586.43, 671,379.64 and 428,149.46

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Solution

The fourth proportional to 447,586.43, 671,379.64 and 428,149.46 is: 642,224.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,586.43 : 671,379.64 = 428,149.46 : x
  2. Step 2: Convert to fraction form
    447,586.43/671,379.64 = 428,149.46/x
  3. Step 3: Cross multiply
    447,586.43x = 671,379.64 × 428,149.46
  4. Step 4: Simplify right side
    447,586.43x = 287,450,830,929.07
  5. Step 5: Solve for x
    x = 287,450,830,929.07/447,586.43
  6. Step 6: Final answer
    x = 642,224.19

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Similar ratio
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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.