Home / 686,605.60-1,029,985.20-213,287.20

Finding the Fourth Proportional to 686,605.60, 1,029,985.20 and 213,287.20

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Solution

The fourth proportional to 686,605.60, 1,029,985.20 and 213,287.20 is: 319,954.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,605.60 : 1,029,985.20 = 213,287.20 : x
  2. Step 2: Convert to fraction form
    686,605.60/1,029,985.20 = 213,287.20/x
  3. Step 3: Cross multiply
    686,605.60x = 1,029,985.20 × 213,287.20
  4. Step 4: Simplify right side
    686,605.60x = 219,682,659,349.44
  5. Step 5: Solve for x
    x = 219,682,659,349.44/686,605.60
  6. Step 6: Final answer
    x = 319,954.66

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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.