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Finding the Fourth Proportional to 330,439.44, 455,990.94 and 187,200.66

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Solution

The fourth proportional to 330,439.44, 455,990.94 and 187,200.66 is: 258,328.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,439.44 : 455,990.94 = 187,200.66 : x
  2. Step 2: Convert to fraction form
    330,439.44/455,990.94 = 187,200.66/x
  3. Step 3: Cross multiply
    330,439.44x = 455,990.94 × 187,200.66
  4. Step 4: Simplify right side
    330,439.44x = 85,361,804,922.02
  5. Step 5: Solve for x
    x = 85,361,804,922.02/330,439.44
  6. Step 6: Final answer
    x = 258,328.14

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1.5x scale

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.