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Finding the Fourth Proportional to 664,956.44, 997,580.51 and 215,722.74

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Solution

The fourth proportional to 664,956.44, 997,580.51 and 215,722.74 is: 323,631.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,956.44 : 997,580.51 = 215,722.74 : x
  2. Step 2: Convert to fraction form
    664,956.44/997,580.51 = 215,722.74/x
  3. Step 3: Cross multiply
    664,956.44x = 997,580.51 × 215,722.74
  4. Step 4: Simplify right side
    664,956.44x = 215,200,804,459.07
  5. Step 5: Solve for x
    x = 215,200,804,459.07/664,956.44
  6. Step 6: Final answer
    x = 323,631.43

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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.