Home / 812,512.58-1,218,765.92-243,891.21

Finding the Fourth Proportional to 812,512.58, 1,218,765.92 and 243,891.21

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Solution

The fourth proportional to 812,512.58, 1,218,765.92 and 243,891.21 is: 365,835.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,512.58 : 1,218,765.92 = 243,891.21 : x
  2. Step 2: Convert to fraction form
    812,512.58/1,218,765.92 = 243,891.21/x
  3. Step 3: Cross multiply
    812,512.58x = 1,218,765.92 × 243,891.21
  4. Step 4: Simplify right side
    812,512.58x = 297,246,294,935.56
  5. Step 5: Solve for x
    x = 297,246,294,935.56/812,512.58
  6. Step 6: Final answer
    x = 365,835.93

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Double scale
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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.