Home / 819,985.94-1,229,987.18-287,519.80

Finding the Fourth Proportional to 819,985.94, 1,229,987.18 and 287,519.80

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Solution

The fourth proportional to 819,985.94, 1,229,987.18 and 287,519.80 is: 431,282.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,985.94 : 1,229,987.18 = 287,519.80 : x
  2. Step 2: Convert to fraction form
    819,985.94/1,229,987.18 = 287,519.80/x
  3. Step 3: Cross multiply
    819,985.94x = 1,229,987.18 × 287,519.80
  4. Step 4: Simplify right side
    819,985.94x = 353,645,667,996.16
  5. Step 5: Solve for x
    x = 353,645,667,996.16/819,985.94
  6. Step 6: Final answer
    x = 431,282.60

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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.