Home / 811,985.80-1,217,891.20-213,007

Finding the Fourth Proportional to 811,985.80, 1,217,891.20 and 213,007

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Solution

The fourth proportional to 811,985.80, 1,217,891.20 and 213,007 is: 319,487.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,985.80 : 1,217,891.20 = 213,007 : x
  2. Step 2: Convert to fraction form
    811,985.80/1,217,891.20 = 213,007/x
  3. Step 3: Cross multiply
    811,985.80x = 1,217,891.20 × 213,007
  4. Step 4: Simplify right side
    811,985.80x = 259,419,350,838.40
  5. Step 5: Solve for x
    x = 259,419,350,838.40/811,985.80
  6. Step 6: Final answer
    x = 319,487.55

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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.