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Finding the Fourth Proportional to 485,064.80, 727,597.20 and 148,104.80

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Solution

The fourth proportional to 485,064.80, 727,597.20 and 148,104.80 is: 222,157.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,064.80 : 727,597.20 = 148,104.80 : x
  2. Step 2: Convert to fraction form
    485,064.80/727,597.20 = 148,104.80/x
  3. Step 3: Cross multiply
    485,064.80x = 727,597.20 × 148,104.80
  4. Step 4: Simplify right side
    485,064.80x = 107,760,637,786.56
  5. Step 5: Solve for x
    x = 107,760,637,786.56/485,064.80
  6. Step 6: Final answer
    x = 222,157.20

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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.