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Finding the Fourth Proportional to 325,613.80, 488,420.70 and 219,325.60

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Solution

The fourth proportional to 325,613.80, 488,420.70 and 219,325.60 is: 328,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,613.80 : 488,420.70 = 219,325.60 : x
  2. Step 2: Convert to fraction form
    325,613.80/488,420.70 = 219,325.60/x
  3. Step 3: Cross multiply
    325,613.80x = 488,420.70 × 219,325.60
  4. Step 4: Simplify right side
    325,613.80x = 107,123,163,079.92
  5. Step 5: Solve for x
    x = 107,123,163,079.92/325,613.80
  6. Step 6: Final answer
    x = 328,988.40

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Similar ratio
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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.