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Finding the Fourth Proportional to 690,145.88, 952,324.76 and 384,151.77

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Solution

The fourth proportional to 690,145.88, 952,324.76 and 384,151.77 is: 530,086.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,145.88 : 952,324.76 = 384,151.77 : x
  2. Step 2: Convert to fraction form
    690,145.88/952,324.76 = 384,151.77/x
  3. Step 3: Cross multiply
    690,145.88x = 952,324.76 × 384,151.77
  4. Step 4: Simplify right side
    690,145.88x = 365,837,243,129.21
  5. Step 5: Solve for x
    x = 365,837,243,129.21/690,145.88
  6. Step 6: Final answer
    x = 530,086.84

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Double scale
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Similar ratio
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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.