Home / 812,359.96-1,219,239.90-391,989.40

Finding the Fourth Proportional to 812,359.96, 1,219,239.90 and 391,989.40

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Solution

The fourth proportional to 812,359.96, 1,219,239.90 and 391,989.40 is: 588,321.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,359.96 : 1,219,239.90 = 391,989.40 : x
  2. Step 2: Convert to fraction form
    812,359.96/1,219,239.90 = 391,989.40/x
  3. Step 3: Cross multiply
    812,359.96x = 1,219,239.90 × 391,989.40
  4. Step 4: Simplify right side
    812,359.96x = 477,929,116,857.06
  5. Step 5: Solve for x
    x = 477,929,116,857.06/812,359.96
  6. Step 6: Final answer
    x = 588,321.85

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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.