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Finding the Fourth Proportional to 623,627.60, 935,441.40 and 387,237.20

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Solution

The fourth proportional to 623,627.60, 935,441.40 and 387,237.20 is: 580,855.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,627.60 : 935,441.40 = 387,237.20 : x
  2. Step 2: Convert to fraction form
    623,627.60/935,441.40 = 387,237.20/x
  3. Step 3: Cross multiply
    623,627.60x = 935,441.40 × 387,237.20
  4. Step 4: Simplify right side
    623,627.60x = 362,237,708,500.08
  5. Step 5: Solve for x
    x = 362,237,708,500.08/623,627.60
  6. Step 6: Final answer
    x = 580,855.80

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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.