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Finding the Fourth Proportional to 647,108.80, 970,663.20 and 556,907.20

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Solution

The fourth proportional to 647,108.80, 970,663.20 and 556,907.20 is: 835,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,108.80 : 970,663.20 = 556,907.20 : x
  2. Step 2: Convert to fraction form
    647,108.80/970,663.20 = 556,907.20/x
  3. Step 3: Cross multiply
    647,108.80x = 970,663.20 × 556,907.20
  4. Step 4: Simplify right side
    647,108.80x = 540,569,324,855.04
  5. Step 5: Solve for x
    x = 540,569,324,855.04/647,108.80
  6. Step 6: Final answer
    x = 835,360.80

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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.