Home / 686,723.10-1,029,987.45-213,456.30

Finding the Fourth Proportional to 686,723.10, 1,029,987.45 and 213,456.30

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Solution

The fourth proportional to 686,723.10, 1,029,987.45 and 213,456.30 is: 320,154.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,723.10 : 1,029,987.45 = 213,456.30 : x
  2. Step 2: Convert to fraction form
    686,723.10/1,029,987.45 = 213,456.30/x
  3. Step 3: Cross multiply
    686,723.10x = 1,029,987.45 × 213,456.30
  4. Step 4: Simplify right side
    686,723.10x = 219,857,310,123.44
  5. Step 5: Solve for x
    x = 219,857,310,123.44/686,723.10
  6. Step 6: Final answer
    x = 320,154.24

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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.