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Finding the Fourth Proportional to 623,813.40, 935,720.10 and 343,877.40

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Solution

The fourth proportional to 623,813.40, 935,720.10 and 343,877.40 is: 515,816.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,813.40 : 935,720.10 = 343,877.40 : x
  2. Step 2: Convert to fraction form
    623,813.40/935,720.10 = 343,877.40/x
  3. Step 3: Cross multiply
    623,813.40x = 935,720.10 × 343,877.40
  4. Step 4: Simplify right side
    623,813.40x = 321,772,995,115.74
  5. Step 5: Solve for x
    x = 321,772,995,115.74/623,813.40
  6. Step 6: Final answer
    x = 515,816.10

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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.