Home / 686,619.20-1,029,928.80-658,625.60

Finding the Fourth Proportional to 686,619.20, 1,029,928.80 and 658,625.60

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Solution

The fourth proportional to 686,619.20, 1,029,928.80 and 658,625.60 is: 987,938.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,619.20 : 1,029,928.80 = 658,625.60 : x
  2. Step 2: Convert to fraction form
    686,619.20/1,029,928.80 = 658,625.60/x
  3. Step 3: Cross multiply
    686,619.20x = 1,029,928.80 × 658,625.60
  4. Step 4: Simplify right side
    686,619.20x = 678,337,473,857.28
  5. Step 5: Solve for x
    x = 678,337,473,857.28/686,619.20
  6. Step 6: Final answer
    x = 987,938.40

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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.