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Finding the Fourth Proportional to 321,838.72, 482,758.08 and 100,240

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Solution

The fourth proportional to 321,838.72, 482,758.08 and 100,240 is: 150,360.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,838.72 : 482,758.08 = 100,240 : x
  2. Step 2: Convert to fraction form
    321,838.72/482,758.08 = 100,240/x
  3. Step 3: Cross multiply
    321,838.72x = 482,758.08 × 100,240
  4. Step 4: Simplify right side
    321,838.72x = 48,391,669,939.20
  5. Step 5: Solve for x
    x = 48,391,669,939.20/321,838.72
  6. Step 6: Final answer
    x = 150,360.00

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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.