Home / 686,962.60-1,030,520.70-213,644.20

Finding the Fourth Proportional to 686,962.60, 1,030,520.70 and 213,644.20

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Solution

The fourth proportional to 686,962.60, 1,030,520.70 and 213,644.20 is: 320,490.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,962.60 : 1,030,520.70 = 213,644.20 : x
  2. Step 2: Convert to fraction form
    686,962.60/1,030,520.70 = 213,644.20/x
  3. Step 3: Cross multiply
    686,962.60x = 1,030,520.70 × 213,644.20
  4. Step 4: Simplify right side
    686,962.60x = 220,164,770,534.94
  5. Step 5: Solve for x
    x = 220,164,770,534.94/686,962.60
  6. Step 6: Final answer
    x = 320,490.18

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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.