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Finding the Fourth Proportional to 623,855.40, 935,783.10 and 340,420.20

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Solution

The fourth proportional to 623,855.40, 935,783.10 and 340,420.20 is: 510,630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,855.40 : 935,783.10 = 340,420.20 : x
  2. Step 2: Convert to fraction form
    623,855.40/935,783.10 = 340,420.20/x
  3. Step 3: Cross multiply
    623,855.40x = 935,783.10 × 340,420.20
  4. Step 4: Simplify right side
    623,855.40x = 318,559,470,058.62
  5. Step 5: Solve for x
    x = 318,559,470,058.62/623,855.40
  6. Step 6: Final answer
    x = 510,630.30

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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.