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Finding the Fourth Proportional to 621,554.31, 932,331.47 and 411,143.04

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Solution

The fourth proportional to 621,554.31, 932,331.47 and 411,143.04 is: 616,714.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,554.31 : 932,331.47 = 411,143.04 : x
  2. Step 2: Convert to fraction form
    621,554.31/932,331.47 = 411,143.04/x
  3. Step 3: Cross multiply
    621,554.31x = 932,331.47 × 411,143.04
  4. Step 4: Simplify right side
    621,554.31x = 383,321,592,807.75
  5. Step 5: Solve for x
    x = 383,321,592,807.75/621,554.31
  6. Step 6: Final answer
    x = 616,714.56

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Half scale
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Double scale
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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.