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Finding the Fourth Proportional to 614,431.80, 921,647.70 and 435,972.60

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Solution

The fourth proportional to 614,431.80, 921,647.70 and 435,972.60 is: 653,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,431.80 : 921,647.70 = 435,972.60 : x
  2. Step 2: Convert to fraction form
    614,431.80/921,647.70 = 435,972.60/x
  3. Step 3: Cross multiply
    614,431.80x = 921,647.70 × 435,972.60
  4. Step 4: Simplify right side
    614,431.80x = 401,813,144,053.02
  5. Step 5: Solve for x
    x = 401,813,144,053.02/614,431.80
  6. Step 6: Final answer
    x = 653,958.90

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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.