Home / 809,780.60-1,214,670.90-620,823.80

Finding the Fourth Proportional to 809,780.60, 1,214,670.90 and 620,823.80

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Solution

The fourth proportional to 809,780.60, 1,214,670.90 and 620,823.80 is: 931,235.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,780.60 : 1,214,670.90 = 620,823.80 : x
  2. Step 2: Convert to fraction form
    809,780.60/1,214,670.90 = 620,823.80/x
  3. Step 3: Cross multiply
    809,780.60x = 1,214,670.90 × 620,823.80
  4. Step 4: Simplify right side
    809,780.60x = 754,096,603,887.42
  5. Step 5: Solve for x
    x = 754,096,603,887.42/809,780.60
  6. Step 6: Final answer
    x = 931,235.70

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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.