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Finding the Fourth Proportional to 613,008.72, 918,734.40 and 275,689.08

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Solution

The fourth proportional to 613,008.72, 918,734.40 and 275,689.08 is: 413,183.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,008.72 : 918,734.40 = 275,689.08 : x
  2. Step 2: Convert to fraction form
    613,008.72/918,734.40 = 275,689.08/x
  3. Step 3: Cross multiply
    613,008.72x = 918,734.40 × 275,689.08
  4. Step 4: Simplify right side
    613,008.72x = 253,285,041,500.35
  5. Step 5: Solve for x
    x = 253,285,041,500.35/613,008.72
  6. Step 6: Final answer
    x = 413,183.42

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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.