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Finding the Fourth Proportional to 326,082.80, 489,124.20 and 282,342.80

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Solution

The fourth proportional to 326,082.80, 489,124.20 and 282,342.80 is: 423,514.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,082.80 : 489,124.20 = 282,342.80 : x
  2. Step 2: Convert to fraction form
    326,082.80/489,124.20 = 282,342.80/x
  3. Step 3: Cross multiply
    326,082.80x = 489,124.20 × 282,342.80
  4. Step 4: Simplify right side
    326,082.80x = 138,100,696,175.76
  5. Step 5: Solve for x
    x = 138,100,696,175.76/326,082.80
  6. Step 6: Final answer
    x = 423,514.20

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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.