Home / 659,621.20-989,431.80-449,669.20

Finding the Fourth Proportional to 659,621.20, 989,431.80 and 449,669.20

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Solution

The fourth proportional to 659,621.20, 989,431.80 and 449,669.20 is: 674,503.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,621.20 : 989,431.80 = 449,669.20 : x
  2. Step 2: Convert to fraction form
    659,621.20/989,431.80 = 449,669.20/x
  3. Step 3: Cross multiply
    659,621.20x = 989,431.80 × 449,669.20
  4. Step 4: Simplify right side
    659,621.20x = 444,917,005,960.56
  5. Step 5: Solve for x
    x = 444,917,005,960.56/659,621.20
  6. Step 6: Final answer
    x = 674,503.80

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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.