Home / 812,530.78-1,218,131.19-306,804.80

Finding the Fourth Proportional to 812,530.78, 1,218,131.19 and 306,804.80

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Solution

The fourth proportional to 812,530.78, 1,218,131.19 and 306,804.80 is: 459,956.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,530.78 : 1,218,131.19 = 306,804.80 : x
  2. Step 2: Convert to fraction form
    812,530.78/1,218,131.19 = 306,804.80/x
  3. Step 3: Cross multiply
    812,530.78x = 1,218,131.19 × 306,804.80
  4. Step 4: Simplify right side
    812,530.78x = 373,728,496,121.71
  5. Step 5: Solve for x
    x = 373,728,496,121.71/812,530.78
  6. Step 6: Final answer
    x = 459,956.11

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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.