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Finding the Fourth Proportional to 321,678.75, 482,518.14 and 220,376.91

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Solution

The fourth proportional to 321,678.75, 482,518.14 and 220,376.91 is: 330,565.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,678.75 : 482,518.14 = 220,376.91 : x
  2. Step 2: Convert to fraction form
    321,678.75/482,518.14 = 220,376.91/x
  3. Step 3: Cross multiply
    321,678.75x = 482,518.14 × 220,376.91
  4. Step 4: Simplify right side
    321,678.75x = 106,335,856,712.15
  5. Step 5: Solve for x
    x = 106,335,856,712.15/321,678.75
  6. Step 6: Final answer
    x = 330,565.38

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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.