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Finding the Fourth Proportional to 328,780.20, 493,364.70 and 118,390.80

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Solution

The fourth proportional to 328,780.20, 493,364.70 and 118,390.80 is: 177,656.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,780.20 : 493,364.70 = 118,390.80 : x
  2. Step 2: Convert to fraction form
    328,780.20/493,364.70 = 118,390.80/x
  3. Step 3: Cross multiply
    328,780.20x = 493,364.70 × 118,390.80
  4. Step 4: Simplify right side
    328,780.20x = 58,409,841,524.76
  5. Step 5: Solve for x
    x = 58,409,841,524.76/328,780.20
  6. Step 6: Final answer
    x = 177,656.20

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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.