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Finding the Fourth Proportional to 615,886.80, 923,830.20 and 412,933.20

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Solution

The fourth proportional to 615,886.80, 923,830.20 and 412,933.20 is: 619,399.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,886.80 : 923,830.20 = 412,933.20 : x
  2. Step 2: Convert to fraction form
    615,886.80/923,830.20 = 412,933.20/x
  3. Step 3: Cross multiply
    615,886.80x = 923,830.20 × 412,933.20
  4. Step 4: Simplify right side
    615,886.80x = 381,480,160,742.64
  5. Step 5: Solve for x
    x = 381,480,160,742.64/615,886.80
  6. Step 6: Final answer
    x = 619,399.80

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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.