Home / 686,383.20-1,029,769.20-213,116.40

Finding the Fourth Proportional to 686,383.20, 1,029,769.20 and 213,116.40

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Solution

The fourth proportional to 686,383.20, 1,029,769.20 and 213,116.40 is: 319,734.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,383.20 : 1,029,769.20 = 213,116.40 : x
  2. Step 2: Convert to fraction form
    686,383.20/1,029,769.20 = 213,116.40/x
  3. Step 3: Cross multiply
    686,383.20x = 1,029,769.20 × 213,116.40
  4. Step 4: Simplify right side
    686,383.20x = 219,460,704,734.88
  5. Step 5: Solve for x
    x = 219,460,704,734.88/686,383.20
  6. Step 6: Final answer
    x = 319,734.96

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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.