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Finding the Fourth Proportional to 665,009.62, 997,654.70 and 215,695.59

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Solution

The fourth proportional to 665,009.62, 997,654.70 and 215,695.59 is: 323,588.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,009.62 : 997,654.70 = 215,695.59 : x
  2. Step 2: Convert to fraction form
    665,009.62/997,654.70 = 215,695.59/x
  3. Step 3: Cross multiply
    665,009.62x = 997,654.70 × 215,695.59
  4. Step 4: Simplify right side
    665,009.62x = 215,189,718,054.30
  5. Step 5: Solve for x
    x = 215,189,718,054.30/665,009.62
  6. Step 6: Final answer
    x = 323,588.88

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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.