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Finding the Fourth Proportional to 662,128.80, 993,193.20 and 520,411.20

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Solution

The fourth proportional to 662,128.80, 993,193.20 and 520,411.20 is: 780,616.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,128.80 : 993,193.20 = 520,411.20 : x
  2. Step 2: Convert to fraction form
    662,128.80/993,193.20 = 520,411.20/x
  3. Step 3: Cross multiply
    662,128.80x = 993,193.20 × 520,411.20
  4. Step 4: Simplify right side
    662,128.80x = 516,868,865,043.84
  5. Step 5: Solve for x
    x = 516,868,865,043.84/662,128.80
  6. Step 6: Final answer
    x = 780,616.80

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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.