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Finding the Fourth Proportional to 612,613.72, 918,969.18 and 191,888.38

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Solution

The fourth proportional to 612,613.72, 918,969.18 and 191,888.38 is: 287,847.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,613.72 : 918,969.18 = 191,888.38 : x
  2. Step 2: Convert to fraction form
    612,613.72/918,969.18 = 191,888.38/x
  3. Step 3: Cross multiply
    612,613.72x = 918,969.18 × 191,888.38
  4. Step 4: Simplify right side
    612,613.72x = 176,339,507,220.13
  5. Step 5: Solve for x
    x = 176,339,507,220.13/612,613.72
  6. Step 6: Final answer
    x = 287,847.79

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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.