Home / 686,600.40-1,029,900.60-213,430.80

Finding the Fourth Proportional to 686,600.40, 1,029,900.60 and 213,430.80

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Solution

The fourth proportional to 686,600.40, 1,029,900.60 and 213,430.80 is: 320,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,600.40 : 1,029,900.60 = 213,430.80 : x
  2. Step 2: Convert to fraction form
    686,600.40/1,029,900.60 = 213,430.80/x
  3. Step 3: Cross multiply
    686,600.40x = 1,029,900.60 × 213,430.80
  4. Step 4: Simplify right side
    686,600.40x = 219,812,508,978.48
  5. Step 5: Solve for x
    x = 219,812,508,978.48/686,600.40
  6. Step 6: Final answer
    x = 320,146.20

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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.