Home / 449,531.40-674,297.10-428,795.40

Finding the Fourth Proportional to 449,531.40, 674,297.10 and 428,795.40

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Solution

The fourth proportional to 449,531.40, 674,297.10 and 428,795.40 is: 643,193.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,531.40 : 674,297.10 = 428,795.40 : x
  2. Step 2: Convert to fraction form
    449,531.40/674,297.10 = 428,795.40/x
  3. Step 3: Cross multiply
    449,531.40x = 674,297.10 × 428,795.40
  4. Step 4: Simplify right side
    449,531.40x = 289,135,494,713.34
  5. Step 5: Solve for x
    x = 289,135,494,713.34/449,531.40
  6. Step 6: Final answer
    x = 643,193.10

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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.