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Finding the Fourth Proportional to 614,440.80, 921,661.20 and 435,981.60

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Solution

The fourth proportional to 614,440.80, 921,661.20 and 435,981.60 is: 653,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,440.80 : 921,661.20 = 435,981.60 : x
  2. Step 2: Convert to fraction form
    614,440.80/921,661.20 = 435,981.60/x
  3. Step 3: Cross multiply
    614,440.80x = 921,661.20 × 435,981.60
  4. Step 4: Simplify right side
    614,440.80x = 401,827,324,633.92
  5. Step 5: Solve for x
    x = 401,827,324,633.92/614,440.80
  6. Step 6: Final answer
    x = 653,972.40

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Similar ratio
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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.