Home / 643,274.88-887,138.15-401,579.79

Finding the Fourth Proportional to 643,274.88, 887,138.15 and 401,579.79

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Solution

The fourth proportional to 643,274.88, 887,138.15 and 401,579.79 is: 553,817.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,274.88 : 887,138.15 = 401,579.79 : x
  2. Step 2: Convert to fraction form
    643,274.88/887,138.15 = 401,579.79/x
  3. Step 3: Cross multiply
    643,274.88x = 887,138.15 × 401,579.79
  4. Step 4: Simplify right side
    643,274.88x = 356,256,751,977.99
  5. Step 5: Solve for x
    x = 356,256,751,977.99/643,274.88
  6. Step 6: Final answer
    x = 553,817.29

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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.