Home / 820,170.70-1,230,450.45-420,873.10

Finding the Fourth Proportional to 820,170.70, 1,230,450.45 and 420,873.10

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Solution

The fourth proportional to 820,170.70, 1,230,450.45 and 420,873.10 is: 631,409.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,170.70 : 1,230,450.45 = 420,873.10 : x
  2. Step 2: Convert to fraction form
    820,170.70/1,230,450.45 = 420,873.10/x
  3. Step 3: Cross multiply
    820,170.70x = 1,230,450.45 × 420,873.10
  4. Step 4: Simplify right side
    820,170.70x = 517,863,495,287.90
  5. Step 5: Solve for x
    x = 517,863,495,287.90/820,170.70
  6. Step 6: Final answer
    x = 631,409.41

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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.