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Finding the Fourth Proportional to 623,637.60, 935,456.40 and 434,680.80

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Solution

The fourth proportional to 623,637.60, 935,456.40 and 434,680.80 is: 652,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,637.60 : 935,456.40 = 434,680.80 : x
  2. Step 2: Convert to fraction form
    623,637.60/935,456.40 = 434,680.80/x
  3. Step 3: Cross multiply
    623,637.60x = 935,456.40 × 434,680.80
  4. Step 4: Simplify right side
    623,637.60x = 406,624,936,317.12
  5. Step 5: Solve for x
    x = 406,624,936,317.12/623,637.60
  6. Step 6: Final answer
    x = 652,021.20

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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.