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Finding the Fourth Proportional to 617,920.40, 866,954.80 and 617,920.40

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Solution

The fourth proportional to 617,920.40, 866,954.80 and 617,920.40 is: 866,954.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,920.40 : 866,954.80 = 617,920.40 : x
  2. Step 2: Convert to fraction form
    617,920.40/866,954.80 = 617,920.40/x
  3. Step 3: Cross multiply
    617,920.40x = 866,954.80 × 617,920.40
  4. Step 4: Simplify right side
    617,920.40x = 535,709,056,797.92
  5. Step 5: Solve for x
    x = 535,709,056,797.92/617,920.40
  6. Step 6: Final answer
    x = 866,954.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.