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Finding the Fourth Proportional to 621,667.81, 932,501.72 and 411,256.54

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Solution

The fourth proportional to 621,667.81, 932,501.72 and 411,256.54 is: 616,884.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,667.81 : 932,501.72 = 411,256.54 : x
  2. Step 2: Convert to fraction form
    621,667.81/932,501.72 = 411,256.54/x
  3. Step 3: Cross multiply
    621,667.81x = 932,501.72 × 411,256.54
  4. Step 4: Simplify right side
    621,667.81x = 383,497,430,911.25
  5. Step 5: Solve for x
    x = 383,497,430,911.25/621,667.81
  6. Step 6: Final answer
    x = 616,884.81

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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.