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Finding the Fourth Proportional to 321,685.98, 482,530.80 and 85,026.16

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Solution

The fourth proportional to 321,685.98, 482,530.80 and 85,026.16 is: 127,539.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,685.98 : 482,530.80 = 85,026.16 : x
  2. Step 2: Convert to fraction form
    321,685.98/482,530.80 = 85,026.16/x
  3. Step 3: Cross multiply
    321,685.98x = 482,530.80 × 85,026.16
  4. Step 4: Simplify right side
    321,685.98x = 41,027,741,005.73
  5. Step 5: Solve for x
    x = 41,027,741,005.73/321,685.98
  6. Step 6: Final answer
    x = 127,539.72

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1.5x scale

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.