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Finding the Fourth Proportional to 655,276.80, 982,915.20 and 255,930.60

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Solution

The fourth proportional to 655,276.80, 982,915.20 and 255,930.60 is: 383,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,276.80 : 982,915.20 = 255,930.60 : x
  2. Step 2: Convert to fraction form
    655,276.80/982,915.20 = 255,930.60/x
  3. Step 3: Cross multiply
    655,276.80x = 982,915.20 × 255,930.60
  4. Step 4: Simplify right side
    655,276.80x = 251,558,076,885.12
  5. Step 5: Solve for x
    x = 251,558,076,885.12/655,276.80
  6. Step 6: Final answer
    x = 383,895.90

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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.