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Finding the Fourth Proportional to 321,162.19, 482,042.18 and 163,508.65

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Solution

The fourth proportional to 321,162.19, 482,042.18 and 163,508.65 is: 245,415.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,162.19 : 482,042.18 = 163,508.65 : x
  2. Step 2: Convert to fraction form
    321,162.19/482,042.18 = 163,508.65/x
  3. Step 3: Cross multiply
    321,162.19x = 482,042.18 × 163,508.65
  4. Step 4: Simplify right side
    321,162.19x = 78,818,066,094.86
  5. Step 5: Solve for x
    x = 78,818,066,094.86/321,162.19
  6. Step 6: Final answer
    x = 245,415.15

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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.