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Finding the Fourth Proportional to 613,009.72, 918,735.90 and 275,690.08

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Solution

The fourth proportional to 613,009.72, 918,735.90 and 275,690.08 is: 413,184.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,009.72 : 918,735.90 = 275,690.08 : x
  2. Step 2: Convert to fraction form
    613,009.72/918,735.90 = 275,690.08/x
  3. Step 3: Cross multiply
    613,009.72x = 918,735.90 × 275,690.08
  4. Step 4: Simplify right side
    613,009.72x = 253,286,373,769.87
  5. Step 5: Solve for x
    x = 253,286,373,769.87/613,009.72
  6. Step 6: Final answer
    x = 413,184.92

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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.