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Finding the Fourth Proportional to 355,809.76, 490,847.80 and 219,794.76

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Solution

The fourth proportional to 355,809.76, 490,847.80 and 219,794.76 is: 303,211.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,809.76 : 490,847.80 = 219,794.76 : x
  2. Step 2: Convert to fraction form
    355,809.76/490,847.80 = 219,794.76/x
  3. Step 3: Cross multiply
    355,809.76x = 490,847.80 × 219,794.76
  4. Step 4: Simplify right side
    355,809.76x = 107,885,774,397.53
  5. Step 5: Solve for x
    x = 107,885,774,397.53/355,809.76
  6. Step 6: Final answer
    x = 303,211.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.