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Finding the Fourth Proportional to 525,310.80, 786,799.80 and 431,998.80

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Solution

The fourth proportional to 525,310.80, 786,799.80 and 431,998.80 is: 647,038.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,310.80 : 786,799.80 = 431,998.80 : x
  2. Step 2: Convert to fraction form
    525,310.80/786,799.80 = 431,998.80/x
  3. Step 3: Cross multiply
    525,310.80x = 786,799.80 × 431,998.80
  4. Step 4: Simplify right side
    525,310.80x = 339,896,569,440.24
  5. Step 5: Solve for x
    x = 339,896,569,440.24/525,310.80
  6. Step 6: Final answer
    x = 647,038.99

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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.