Home / 687,914.40-1,029,830.40-511,204.80

Finding the Fourth Proportional to 687,914.40, 1,029,830.40 and 511,204.80

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Solution

The fourth proportional to 687,914.40, 1,029,830.40 and 511,204.80 is: 765,290.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,914.40 : 1,029,830.40 = 511,204.80 : x
  2. Step 2: Convert to fraction form
    687,914.40/1,029,830.40 = 511,204.80/x
  3. Step 3: Cross multiply
    687,914.40x = 1,029,830.40 × 511,204.80
  4. Step 4: Simplify right side
    687,914.40x = 526,454,243,665.92
  5. Step 5: Solve for x
    x = 526,454,243,665.92/687,914.40
  6. Step 6: Final answer
    x = 765,290.34

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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.