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Finding the Fourth Proportional to 271,909.40, 407,864.10 and 172,182.20

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Solution

The fourth proportional to 271,909.40, 407,864.10 and 172,182.20 is: 258,273.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,909.40 : 407,864.10 = 172,182.20 : x
  2. Step 2: Convert to fraction form
    271,909.40/407,864.10 = 172,182.20/x
  3. Step 3: Cross multiply
    271,909.40x = 407,864.10 × 172,182.20
  4. Step 4: Simplify right side
    271,909.40x = 70,226,938,039.02
  5. Step 5: Solve for x
    x = 70,226,938,039.02/271,909.40
  6. Step 6: Final answer
    x = 258,273.30

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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.