Home / 812,321.64-1,218,478.32-205,111.08

Finding the Fourth Proportional to 812,321.64, 1,218,478.32 and 205,111.08

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Solution

The fourth proportional to 812,321.64, 1,218,478.32 and 205,111.08 is: 307,665.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,321.64 : 1,218,478.32 = 205,111.08 : x
  2. Step 2: Convert to fraction form
    812,321.64/1,218,478.32 = 205,111.08/x
  3. Step 3: Cross multiply
    812,321.64x = 1,218,478.32 × 205,111.08
  4. Step 4: Simplify right side
    812,321.64x = 249,923,404,171.79
  5. Step 5: Solve for x
    x = 249,923,404,171.79/812,321.64
  6. Step 6: Final answer
    x = 307,665.57

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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.