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Finding the Fourth Proportional to 612,779.45, 919,220.62 and 186,318.98

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Solution

The fourth proportional to 612,779.45, 919,220.62 and 186,318.98 is: 279,494.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,779.45 : 919,220.62 = 186,318.98 : x
  2. Step 2: Convert to fraction form
    612,779.45/919,220.62 = 186,318.98/x
  3. Step 3: Cross multiply
    612,779.45x = 919,220.62 × 186,318.98
  4. Step 4: Simplify right side
    612,779.45x = 171,268,248,313.37
  5. Step 5: Solve for x
    x = 171,268,248,313.37/612,779.45
  6. Step 6: Final answer
    x = 279,494.11

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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.