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Finding the Fourth Proportional to 623,909.60, 935,864.40 and 618,660.80

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Solution

The fourth proportional to 623,909.60, 935,864.40 and 618,660.80 is: 927,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,909.60 : 935,864.40 = 618,660.80 : x
  2. Step 2: Convert to fraction form
    623,909.60/935,864.40 = 618,660.80/x
  3. Step 3: Cross multiply
    623,909.60x = 935,864.40 × 618,660.80
  4. Step 4: Simplify right side
    623,909.60x = 578,982,618,395.52
  5. Step 5: Solve for x
    x = 578,982,618,395.52/623,909.60
  6. Step 6: Final answer
    x = 927,991.20

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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.