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Finding the Fourth Proportional to 623,821.40, 935,732.10 and 343,885.40

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Solution

The fourth proportional to 623,821.40, 935,732.10 and 343,885.40 is: 515,828.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,821.40 : 935,732.10 = 343,885.40 : x
  2. Step 2: Convert to fraction form
    623,821.40/935,732.10 = 343,885.40/x
  3. Step 3: Cross multiply
    623,821.40x = 935,732.10 × 343,885.40
  4. Step 4: Simplify right side
    623,821.40x = 321,784,607,501.34
  5. Step 5: Solve for x
    x = 321,784,607,501.34/623,821.40
  6. Step 6: Final answer
    x = 515,828.10

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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.