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Finding the Fourth Proportional to 605,369.50, 905,812.26 and 378,925.90

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Solution

The fourth proportional to 605,369.50, 905,812.26 and 378,925.90 is: 566,985.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,369.50 : 905,812.26 = 378,925.90 : x
  2. Step 2: Convert to fraction form
    605,369.50/905,812.26 = 378,925.90/x
  3. Step 3: Cross multiply
    605,369.50x = 905,812.26 × 378,925.90
  4. Step 4: Simplify right side
    605,369.50x = 343,235,725,851.53
  5. Step 5: Solve for x
    x = 343,235,725,851.53/605,369.50
  6. Step 6: Final answer
    x = 566,985.50

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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.