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Finding the Fourth Proportional to 664,997.04, 997,401.96 and 215,721.84

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Solution

The fourth proportional to 664,997.04, 997,401.96 and 215,721.84 is: 323,552.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,997.04 : 997,401.96 = 215,721.84 : x
  2. Step 2: Convert to fraction form
    664,997.04/997,401.96 = 215,721.84/x
  3. Step 3: Cross multiply
    664,997.04x = 997,401.96 × 215,721.84
  4. Step 4: Simplify right side
    664,997.04x = 215,161,386,030.81
  5. Step 5: Solve for x
    x = 215,161,386,030.81/664,997.04
  6. Step 6: Final answer
    x = 323,552.40

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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.