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Finding the Fourth Proportional to 397,145.01, 548,064.32 and 215,856.96

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Solution

The fourth proportional to 397,145.01, 548,064.32 and 215,856.96 is: 297,884.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,145.01 : 548,064.32 = 215,856.96 : x
  2. Step 2: Convert to fraction form
    397,145.01/548,064.32 = 215,856.96/x
  3. Step 3: Cross multiply
    397,145.01x = 548,064.32 × 215,856.96
  4. Step 4: Simplify right side
    397,145.01x = 118,303,497,999.67
  5. Step 5: Solve for x
    x = 118,303,497,999.67/397,145.01
  6. Step 6: Final answer
    x = 297,884.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.