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Finding the Fourth Proportional to 511,485.85, 767,231.21 and 156,499.30

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Solution

The fourth proportional to 511,485.85, 767,231.21 and 156,499.30 is: 234,749.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,485.85 : 767,231.21 = 156,499.30 : x
  2. Step 2: Convert to fraction form
    511,485.85/767,231.21 = 156,499.30/x
  3. Step 3: Cross multiply
    511,485.85x = 767,231.21 × 156,499.30
  4. Step 4: Simplify right side
    511,485.85x = 120,071,147,303.15
  5. Step 5: Solve for x
    x = 120,071,147,303.15/511,485.85
  6. Step 6: Final answer
    x = 234,749.70

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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.