Home / 686,961.60-1,030,519.20-213,643.20

Finding the Fourth Proportional to 686,961.60, 1,030,519.20 and 213,643.20

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Solution

The fourth proportional to 686,961.60, 1,030,519.20 and 213,643.20 is: 320,488.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,961.60 : 1,030,519.20 = 213,643.20 : x
  2. Step 2: Convert to fraction form
    686,961.60/1,030,519.20 = 213,643.20/x
  3. Step 3: Cross multiply
    686,961.60x = 1,030,519.20 × 213,643.20
  4. Step 4: Simplify right side
    686,961.60x = 220,163,419,549.44
  5. Step 5: Solve for x
    x = 220,163,419,549.44/686,961.60
  6. Step 6: Final answer
    x = 320,488.68

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1.5x scale

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.