Home / 687,910.40-1,029,824.40-511,200.80

Finding the Fourth Proportional to 687,910.40, 1,029,824.40 and 511,200.80

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Solution

The fourth proportional to 687,910.40, 1,029,824.40 and 511,200.80 is: 765,284.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,910.40 : 1,029,824.40 = 511,200.80 : x
  2. Step 2: Convert to fraction form
    687,910.40/1,029,824.40 = 511,200.80/x
  3. Step 3: Cross multiply
    687,910.40x = 1,029,824.40 × 511,200.80
  4. Step 4: Simplify right side
    687,910.40x = 526,447,057,139.52
  5. Step 5: Solve for x
    x = 526,447,057,139.52/687,910.40
  6. Step 6: Final answer
    x = 765,284.34

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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.