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Finding the Fourth Proportional to 605,370.50, 905,813.76 and 378,926.90

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Solution

The fourth proportional to 605,370.50, 905,813.76 and 378,926.90 is: 566,986.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,370.50 : 905,813.76 = 378,926.90 : x
  2. Step 2: Convert to fraction form
    605,370.50/905,813.76 = 378,926.90/x
  3. Step 3: Cross multiply
    605,370.50x = 905,813.76 × 378,926.90
  4. Step 4: Simplify right side
    605,370.50x = 343,237,200,054.14
  5. Step 5: Solve for x
    x = 343,237,200,054.14/605,370.50
  6. Step 6: Final answer
    x = 566,986.99

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1.5x scale

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.