Home / 812,715.84-1,219,268.40-339,137.76

Finding the Fourth Proportional to 812,715.84, 1,219,268.40 and 339,137.76

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Solution

The fourth proportional to 812,715.84, 1,219,268.40 and 339,137.76 is: 508,787.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,715.84 : 1,219,268.40 = 339,137.76 : x
  2. Step 2: Convert to fraction form
    812,715.84/1,219,268.40 = 339,137.76/x
  3. Step 3: Cross multiply
    812,715.84x = 1,219,268.40 × 339,137.76
  4. Step 4: Simplify right side
    812,715.84x = 413,499,954,014.78
  5. Step 5: Solve for x
    x = 413,499,954,014.78/812,715.84
  6. Step 6: Final answer
    x = 508,787.86

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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.