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Finding the Fourth Proportional to 405,763.40, 609,144.30 and 256,003.40

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Solution

The fourth proportional to 405,763.40, 609,144.30 and 256,003.40 is: 384,320.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,763.40 : 609,144.30 = 256,003.40 : x
  2. Step 2: Convert to fraction form
    405,763.40/609,144.30 = 256,003.40/x
  3. Step 3: Cross multiply
    405,763.40x = 609,144.30 × 256,003.40
  4. Step 4: Simplify right side
    405,763.40x = 155,943,011,890.62
  5. Step 5: Solve for x
    x = 155,943,011,890.62/405,763.40
  6. Step 6: Final answer
    x = 384,320.05

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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.