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Finding the Fourth Proportional to 638,405.60, 957,608.40 and 372,466.40

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Solution

The fourth proportional to 638,405.60, 957,608.40 and 372,466.40 is: 558,699.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,405.60 : 957,608.40 = 372,466.40 : x
  2. Step 2: Convert to fraction form
    638,405.60/957,608.40 = 372,466.40/x
  3. Step 3: Cross multiply
    638,405.60x = 957,608.40 × 372,466.40
  4. Step 4: Simplify right side
    638,405.60x = 356,676,953,357.76
  5. Step 5: Solve for x
    x = 356,676,953,357.76/638,405.60
  6. Step 6: Final answer
    x = 558,699.60

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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.