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Finding the Fourth Proportional to 690,009.92, 952,203.49 and 384,085.86

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Solution

The fourth proportional to 690,009.92, 952,203.49 and 384,085.86 is: 530,032.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,009.92 : 952,203.49 = 384,085.86 : x
  2. Step 2: Convert to fraction form
    690,009.92/952,203.49 = 384,085.86/x
  3. Step 3: Cross multiply
    690,009.92x = 952,203.49 × 384,085.86
  4. Step 4: Simplify right side
    690,009.92x = 365,727,896,351.65
  5. Step 5: Solve for x
    x = 365,727,896,351.65/690,009.92
  6. Step 6: Final answer
    x = 530,032.81

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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.