Home / 812,123.55-1,219,989.60-679,263.30

Finding the Fourth Proportional to 812,123.55, 1,219,989.60 and 679,263.30

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Solution

The fourth proportional to 812,123.55, 1,219,989.60 and 679,263.30 is: 1,020,404.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,123.55 : 1,219,989.60 = 679,263.30 : x
  2. Step 2: Convert to fraction form
    812,123.55/1,219,989.60 = 679,263.30/x
  3. Step 3: Cross multiply
    812,123.55x = 1,219,989.60 × 679,263.30
  4. Step 4: Simplify right side
    812,123.55x = 828,694,161,661.68
  5. Step 5: Solve for x
    x = 828,694,161,661.68/812,123.55
  6. Step 6: Final answer
    x = 1,020,404.05

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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.