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Finding the Fourth Proportional to 690,390.77, 952,736.24 and 384,470.78

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Solution

The fourth proportional to 690,390.77, 952,736.24 and 384,470.78 is: 530,567.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,390.77 : 952,736.24 = 384,470.78 : x
  2. Step 2: Convert to fraction form
    690,390.77/952,736.24 = 384,470.78/x
  3. Step 3: Cross multiply
    690,390.77x = 952,736.24 × 384,470.78
  4. Step 4: Simplify right side
    690,390.77x = 366,299,241,524.56
  5. Step 5: Solve for x
    x = 366,299,241,524.56/690,390.77
  6. Step 6: Final answer
    x = 530,567.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.