Home / 812,815.56-1,121,672.88-445,289.76

Finding the Fourth Proportional to 812,815.56, 1,121,672.88 and 445,289.76

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Solution

The fourth proportional to 812,815.56, 1,121,672.88 and 445,289.76 is: 614,492.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,815.56 : 1,121,672.88 = 445,289.76 : x
  2. Step 2: Convert to fraction form
    812,815.56/1,121,672.88 = 445,289.76/x
  3. Step 3: Cross multiply
    812,815.56x = 1,121,672.88 × 445,289.76
  4. Step 4: Simplify right side
    812,815.56x = 499,469,447,533.71
  5. Step 5: Solve for x
    x = 499,469,447,533.71/812,815.56
  6. Step 6: Final answer
    x = 614,492.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.