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Finding the Fourth Proportional to 620,639.64, 930,957.78 and 165,230.88

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Solution

The fourth proportional to 620,639.64, 930,957.78 and 165,230.88 is: 247,845.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,639.64 : 930,957.78 = 165,230.88 : x
  2. Step 2: Convert to fraction form
    620,639.64/930,957.78 = 165,230.88/x
  3. Step 3: Cross multiply
    620,639.64x = 930,957.78 × 165,230.88
  4. Step 4: Simplify right side
    620,639.64x = 153,822,973,232.25
  5. Step 5: Solve for x
    x = 153,822,973,232.25/620,639.64
  6. Step 6: Final answer
    x = 247,845.87

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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.