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Finding the Fourth Proportional to 664,592.80, 996,986.40 and 215,237.20

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Solution

The fourth proportional to 664,592.80, 996,986.40 and 215,237.20 is: 322,887.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,592.80 : 996,986.40 = 215,237.20 : x
  2. Step 2: Convert to fraction form
    664,592.80/996,986.40 = 215,237.20/x
  3. Step 3: Cross multiply
    664,592.80x = 996,986.40 × 215,237.20
  4. Step 4: Simplify right side
    664,592.80x = 214,588,561,174.08
  5. Step 5: Solve for x
    x = 214,588,561,174.08/664,592.80
  6. Step 6: Final answer
    x = 322,887.28

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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.