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Finding the Fourth Proportional to 328,479.20, 492,718.80 and 275,335.10

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Solution

The fourth proportional to 328,479.20, 492,718.80 and 275,335.10 is: 413,002.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,479.20 : 492,718.80 = 275,335.10 : x
  2. Step 2: Convert to fraction form
    328,479.20/492,718.80 = 275,335.10/x
  3. Step 3: Cross multiply
    328,479.20x = 492,718.80 × 275,335.10
  4. Step 4: Simplify right side
    328,479.20x = 135,662,780,069.88
  5. Step 5: Solve for x
    x = 135,662,780,069.88/328,479.20
  6. Step 6: Final answer
    x = 413,002.65

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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.