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Finding the Fourth Proportional to 683,689.40, 943,487.76 and 377,786.87

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Solution

The fourth proportional to 683,689.40, 943,487.76 and 377,786.87 is: 521,343.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    683,689.40 : 943,487.76 = 377,786.87 : x
  2. Step 2: Convert to fraction form
    683,689.40/943,487.76 = 377,786.87/x
  3. Step 3: Cross multiply
    683,689.40x = 943,487.76 × 377,786.87
  4. Step 4: Simplify right side
    683,689.40x = 356,437,287,733.71
  5. Step 5: Solve for x
    x = 356,437,287,733.71/683,689.40
  6. Step 6: Final answer
    x = 521,343.88

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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.