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Finding the Fourth Proportional to 354,920.80, 532,381.20 and 319,928.80

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Solution

The fourth proportional to 354,920.80, 532,381.20 and 319,928.80 is: 479,893.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,920.80 : 532,381.20 = 319,928.80 : x
  2. Step 2: Convert to fraction form
    354,920.80/532,381.20 = 319,928.80/x
  3. Step 3: Cross multiply
    354,920.80x = 532,381.20 × 319,928.80
  4. Step 4: Simplify right side
    354,920.80x = 170,324,078,458.56
  5. Step 5: Solve for x
    x = 170,324,078,458.56/354,920.80
  6. Step 6: Final answer
    x = 479,893.20

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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.