Home / 686,708.40-1,030,219.20-213,441.60

Finding the Fourth Proportional to 686,708.40, 1,030,219.20 and 213,441.60

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Solution

The fourth proportional to 686,708.40, 1,030,219.20 and 213,441.60 is: 320,211.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,708.40 : 1,030,219.20 = 213,441.60 : x
  2. Step 2: Convert to fraction form
    686,708.40/1,030,219.20 = 213,441.60/x
  3. Step 3: Cross multiply
    686,708.40x = 1,030,219.20 × 213,441.60
  4. Step 4: Simplify right side
    686,708.40x = 219,891,634,398.72
  5. Step 5: Solve for x
    x = 219,891,634,398.72/686,708.40
  6. Step 6: Final answer
    x = 320,211.07

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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.