Home / 643,419.96-887,916.83-356,940.05

Finding the Fourth Proportional to 643,419.96, 887,916.83 and 356,940.05

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Solution

The fourth proportional to 643,419.96, 887,916.83 and 356,940.05 is: 492,575.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,419.96 : 887,916.83 = 356,940.05 : x
  2. Step 2: Convert to fraction form
    643,419.96/887,916.83 = 356,940.05/x
  3. Step 3: Cross multiply
    643,419.96x = 887,916.83 × 356,940.05
  4. Step 4: Simplify right side
    643,419.96x = 316,933,071,471.76
  5. Step 5: Solve for x
    x = 316,933,071,471.76/643,419.96
  6. Step 6: Final answer
    x = 492,575.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.