Home / 429,884.90-643,844.10-205,403.03

Finding the Fourth Proportional to 429,884.90, 643,844.10 and 205,403.03

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Solution

The fourth proportional to 429,884.90, 643,844.10 and 205,403.03 is: 307,634.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,884.90 : 643,844.10 = 205,403.03 : x
  2. Step 2: Convert to fraction form
    429,884.90/643,844.10 = 205,403.03/x
  3. Step 3: Cross multiply
    429,884.90x = 643,844.10 × 205,403.03
  4. Step 4: Simplify right side
    429,884.90x = 132,247,528,987.62
  5. Step 5: Solve for x
    x = 132,247,528,987.62/429,884.90
  6. Step 6: Final answer
    x = 307,634.74

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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.