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Finding the Fourth Proportional to 454,415.40, 681,623.10 and 217,636.20

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Solution

The fourth proportional to 454,415.40, 681,623.10 and 217,636.20 is: 326,454.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,415.40 : 681,623.10 = 217,636.20 : x
  2. Step 2: Convert to fraction form
    454,415.40/681,623.10 = 217,636.20/x
  3. Step 3: Cross multiply
    454,415.40x = 681,623.10 × 217,636.20
  4. Step 4: Simplify right side
    454,415.40x = 148,345,861,316.22
  5. Step 5: Solve for x
    x = 148,345,861,316.22/454,415.40
  6. Step 6: Final answer
    x = 326,454.30

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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.