Home / 687,257.88-1,030,472.64-308,110.05

Finding the Fourth Proportional to 687,257.88, 1,030,472.64 and 308,110.05

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Solution

The fourth proportional to 687,257.88, 1,030,472.64 and 308,110.05 is: 461,979.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,257.88 : 1,030,472.64 = 308,110.05 : x
  2. Step 2: Convert to fraction form
    687,257.88/1,030,472.64 = 308,110.05/x
  3. Step 3: Cross multiply
    687,257.88x = 1,030,472.64 × 308,110.05
  4. Step 4: Simplify right side
    687,257.88x = 317,498,976,634.03
  5. Step 5: Solve for x
    x = 317,498,976,634.03/687,257.88
  6. Step 6: Final answer
    x = 461,979.39

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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.