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Finding the Fourth Proportional to 519,998.40, 780,256.80 and 295,531.20

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Solution

The fourth proportional to 519,998.40, 780,256.80 and 295,531.20 is: 443,444.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,998.40 : 780,256.80 = 295,531.20 : x
  2. Step 2: Convert to fraction form
    519,998.40/780,256.80 = 295,531.20/x
  3. Step 3: Cross multiply
    519,998.40x = 780,256.80 × 295,531.20
  4. Step 4: Simplify right side
    519,998.40x = 230,590,228,412.16
  5. Step 5: Solve for x
    x = 230,590,228,412.16/519,998.40
  6. Step 6: Final answer
    x = 443,444.11

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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.