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Finding the Fourth Proportional to 621,060.67, 930,096.07 and 420,773.85

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Solution

The fourth proportional to 621,060.67, 930,096.07 and 420,773.85 is: 630,147.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,060.67 : 930,096.07 = 420,773.85 : x
  2. Step 2: Convert to fraction form
    621,060.67/930,096.07 = 420,773.85/x
  3. Step 3: Cross multiply
    621,060.67x = 930,096.07 × 420,773.85
  4. Step 4: Simplify right side
    621,060.67x = 391,360,101,276.73
  5. Step 5: Solve for x
    x = 391,360,101,276.73/621,060.67
  6. Step 6: Final answer
    x = 630,147.94

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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.