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Finding the Fourth Proportional to 620,153.70, 930,230.55 and 611,859.30

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Solution

The fourth proportional to 620,153.70, 930,230.55 and 611,859.30 is: 917,788.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,153.70 : 930,230.55 = 611,859.30 : x
  2. Step 2: Convert to fraction form
    620,153.70/930,230.55 = 611,859.30/x
  3. Step 3: Cross multiply
    620,153.70x = 930,230.55 × 611,859.30
  4. Step 4: Simplify right side
    620,153.70x = 569,170,213,161.62
  5. Step 5: Solve for x
    x = 569,170,213,161.62/620,153.70
  6. Step 6: Final answer
    x = 917,788.95

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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.