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Finding the Fourth Proportional to 271,718.80, 407,885.40 and 209,664.40

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Solution

The fourth proportional to 271,718.80, 407,885.40 and 209,664.40 is: 314,733.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,718.80 : 407,885.40 = 209,664.40 : x
  2. Step 2: Convert to fraction form
    271,718.80/407,885.40 = 209,664.40/x
  3. Step 3: Cross multiply
    271,718.80x = 407,885.40 × 209,664.40
  4. Step 4: Simplify right side
    271,718.80x = 85,519,047,659.76
  5. Step 5: Solve for x
    x = 85,519,047,659.76/271,718.80
  6. Step 6: Final answer
    x = 314,733.64

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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.