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Finding the Fourth Proportional to 623,308.40, 935,999.40 and 343,026.80

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Solution

The fourth proportional to 623,308.40, 935,999.40 and 343,026.80 is: 515,110.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,308.40 : 935,999.40 = 343,026.80 : x
  2. Step 2: Convert to fraction form
    623,308.40/935,999.40 = 343,026.80/x
  3. Step 3: Cross multiply
    623,308.40x = 935,999.40 × 343,026.80
  4. Step 4: Simplify right side
    623,308.40x = 321,072,878,983.92
  5. Step 5: Solve for x
    x = 321,072,878,983.92/623,308.40
  6. Step 6: Final answer
    x = 515,110.78

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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.