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Finding the Fourth Proportional to 623,905.40, 935,858.10 and 557,420.60

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Solution

The fourth proportional to 623,905.40, 935,858.10 and 557,420.60 is: 836,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,905.40 : 935,858.10 = 557,420.60 : x
  2. Step 2: Convert to fraction form
    623,905.40/935,858.10 = 557,420.60/x
  3. Step 3: Cross multiply
    623,905.40x = 935,858.10 × 557,420.60
  4. Step 4: Simplify right side
    623,905.40x = 521,666,583,616.86
  5. Step 5: Solve for x
    x = 521,666,583,616.86/623,905.40
  6. Step 6: Final answer
    x = 836,130.90

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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.