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Finding the Fourth Proportional to 690,965.88, 953,493.57 and 380,806.92

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Solution

The fourth proportional to 690,965.88, 953,493.57 and 380,806.92 is: 525,491.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,965.88 : 953,493.57 = 380,806.92 : x
  2. Step 2: Convert to fraction form
    690,965.88/953,493.57 = 380,806.92/x
  3. Step 3: Cross multiply
    690,965.88x = 953,493.57 × 380,806.92
  4. Step 4: Simplify right side
    690,965.88x = 363,096,949,631.50
  5. Step 5: Solve for x
    x = 363,096,949,631.50/690,965.88
  6. Step 6: Final answer
    x = 525,491.87

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Double scale
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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.