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Finding the Fourth Proportional to 630,615.92, 868,771.32 and 439,283.12

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Solution

The fourth proportional to 630,615.92, 868,771.32 and 439,283.12 is: 605,180.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,615.92 : 868,771.32 = 439,283.12 : x
  2. Step 2: Convert to fraction form
    630,615.92/868,771.32 = 439,283.12/x
  3. Step 3: Cross multiply
    630,615.92x = 868,771.32 × 439,283.12
  4. Step 4: Simplify right side
    630,615.92x = 381,636,576,016.12
  5. Step 5: Solve for x
    x = 381,636,576,016.12/630,615.92
  6. Step 6: Final answer
    x = 605,180.69

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.