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Finding the Fourth Proportional to 664,988.70, 997,389.52 and 215,713.51

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Solution

The fourth proportional to 664,988.70, 997,389.52 and 215,713.51 is: 323,539.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,988.70 : 997,389.52 = 215,713.51 : x
  2. Step 2: Convert to fraction form
    664,988.70/997,389.52 = 215,713.51/x
  3. Step 3: Cross multiply
    664,988.70x = 997,389.52 × 215,713.51
  4. Step 4: Simplify right side
    664,988.70x = 215,150,397,987.36
  5. Step 5: Solve for x
    x = 215,150,397,987.36/664,988.70
  6. Step 6: Final answer
    x = 323,539.93

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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.