Home / 643,899.40-966,626.70-639,233.80

Finding the Fourth Proportional to 643,899.40, 966,626.70 and 639,233.80

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Solution

The fourth proportional to 643,899.40, 966,626.70 and 639,233.80 is: 959,622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,899.40 : 966,626.70 = 639,233.80 : x
  2. Step 2: Convert to fraction form
    643,899.40/966,626.70 = 639,233.80/x
  3. Step 3: Cross multiply
    643,899.40x = 966,626.70 × 639,233.80
  4. Step 4: Simplify right side
    643,899.40x = 617,900,458,622.46
  5. Step 5: Solve for x
    x = 617,900,458,622.46/643,899.40
  6. Step 6: Final answer
    x = 959,622.67

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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.