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Finding the Fourth Proportional to 485,999.42, 670,679.62 and 271,139.55

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Solution

The fourth proportional to 485,999.42, 670,679.62 and 271,139.55 is: 374,172.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,999.42 : 670,679.62 = 271,139.55 : x
  2. Step 2: Convert to fraction form
    485,999.42/670,679.62 = 271,139.55/x
  3. Step 3: Cross multiply
    485,999.42x = 670,679.62 × 271,139.55
  4. Step 4: Simplify right side
    485,999.42x = 181,847,771,703.23
  5. Step 5: Solve for x
    x = 181,847,771,703.23/485,999.42
  6. Step 6: Final answer
    x = 374,172.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.