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Finding the Fourth Proportional to 664,287.95, 996,590.10 and 215,008.90

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Solution

The fourth proportional to 664,287.95, 996,590.10 and 215,008.90 is: 322,564.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,287.95 : 996,590.10 = 215,008.90 : x
  2. Step 2: Convert to fraction form
    664,287.95/996,590.10 = 215,008.90/x
  3. Step 3: Cross multiply
    664,287.95x = 996,590.10 × 215,008.90
  4. Step 4: Simplify right side
    664,287.95x = 214,275,739,466.70
  5. Step 5: Solve for x
    x = 214,275,739,466.70/664,287.95
  6. Step 6: Final answer
    x = 322,564.54

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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.