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Finding the Fourth Proportional to 605,064, 908,010.72 and 211,080

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Solution

The fourth proportional to 605,064, 908,010.72 and 211,080 is: 316,764.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,064 : 908,010.72 = 211,080 : x
  2. Step 2: Convert to fraction form
    605,064/908,010.72 = 211,080/x
  3. Step 3: Cross multiply
    605,064x = 908,010.72 × 211,080
  4. Step 4: Simplify right side
    605,064x = 191,662,902,777.60
  5. Step 5: Solve for x
    x = 191,662,902,777.60/605,064
  6. Step 6: Final answer
    x = 316,764.68

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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.