Home / 643,916.20-966,311.70-359,606.20

Finding the Fourth Proportional to 643,916.20, 966,311.70 and 359,606.20

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Solution

The fourth proportional to 643,916.20, 966,311.70 and 359,606.20 is: 539,653.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,916.20 : 966,311.70 = 359,606.20 : x
  2. Step 2: Convert to fraction form
    643,916.20/966,311.70 = 359,606.20/x
  3. Step 3: Cross multiply
    643,916.20x = 966,311.70 × 359,606.20
  4. Step 4: Simplify right side
    643,916.20x = 347,491,678,452.54
  5. Step 5: Solve for x
    x = 347,491,678,452.54/643,916.20
  6. Step 6: Final answer
    x = 539,653.57

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.