Home / 519,311.40-778,890.30-145,372.20

Finding the Fourth Proportional to 519,311.40, 778,890.30 and 145,372.20

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Solution

The fourth proportional to 519,311.40, 778,890.30 and 145,372.20 is: 218,036.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,311.40 : 778,890.30 = 145,372.20 : x
  2. Step 2: Convert to fraction form
    519,311.40/778,890.30 = 145,372.20/x
  3. Step 3: Cross multiply
    519,311.40x = 778,890.30 × 145,372.20
  4. Step 4: Simplify right side
    519,311.40x = 113,228,996,469.66
  5. Step 5: Solve for x
    x = 113,228,996,469.66/519,311.40
  6. Step 6: Final answer
    x = 218,036.80

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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.