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Finding the Fourth Proportional to 330,393.76, 492,093.68 and 328,782.76

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Solution

The fourth proportional to 330,393.76, 492,093.68 and 328,782.76 is: 489,694.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,393.76 : 492,093.68 = 328,782.76 : x
  2. Step 2: Convert to fraction form
    330,393.76/492,093.68 = 328,782.76/x
  3. Step 3: Cross multiply
    330,393.76x = 492,093.68 × 328,782.76
  4. Step 4: Simplify right side
    330,393.76x = 161,791,918,288.96
  5. Step 5: Solve for x
    x = 161,791,918,288.96/330,393.76
  6. Step 6: Final answer
    x = 489,694.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.