Home / 687,998.40-1,029,956.40-511,288.80

Finding the Fourth Proportional to 687,998.40, 1,029,956.40 and 511,288.80

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Solution

The fourth proportional to 687,998.40, 1,029,956.40 and 511,288.80 is: 765,416.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,998.40 : 1,029,956.40 = 511,288.80 : x
  2. Step 2: Convert to fraction form
    687,998.40/1,029,956.40 = 511,288.80/x
  3. Step 3: Cross multiply
    687,998.40x = 1,029,956.40 × 511,288.80
  4. Step 4: Simplify right side
    687,998.40x = 526,605,171,808.32
  5. Step 5: Solve for x
    x = 526,605,171,808.32/687,998.40
  6. Step 6: Final answer
    x = 765,416.27

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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.