Home / 812,808.78-1,218,870.81-307,284.54

Finding the Fourth Proportional to 812,808.78, 1,218,870.81 and 307,284.54

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Solution

The fourth proportional to 812,808.78, 1,218,870.81 and 307,284.54 is: 460,797.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,808.78 : 1,218,870.81 = 307,284.54 : x
  2. Step 2: Convert to fraction form
    812,808.78/1,218,870.81 = 307,284.54/x
  3. Step 3: Cross multiply
    812,808.78x = 1,218,870.81 × 307,284.54
  4. Step 4: Simplify right side
    812,808.78x = 374,540,156,170.28
  5. Step 5: Solve for x
    x = 374,540,156,170.28/812,808.78
  6. Step 6: Final answer
    x = 460,797.38

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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.