Home / 687,112.80-1,030,766.40-213,748.80

Finding the Fourth Proportional to 687,112.80, 1,030,766.40 and 213,748.80

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Solution

The fourth proportional to 687,112.80, 1,030,766.40 and 213,748.80 is: 320,653.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,112.80 : 1,030,766.40 = 213,748.80 : x
  2. Step 2: Convert to fraction form
    687,112.80/1,030,766.40 = 213,748.80/x
  3. Step 3: Cross multiply
    687,112.80x = 1,030,766.40 × 213,748.80
  4. Step 4: Simplify right side
    687,112.80x = 220,325,081,080.32
  5. Step 5: Solve for x
    x = 220,325,081,080.32/687,112.80
  6. Step 6: Final answer
    x = 320,653.44

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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.