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Finding the Fourth Proportional to 267,390.60, 401,085.90 and 172,912.20

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Solution

The fourth proportional to 267,390.60, 401,085.90 and 172,912.20 is: 259,368.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,390.60 : 401,085.90 = 172,912.20 : x
  2. Step 2: Convert to fraction form
    267,390.60/401,085.90 = 172,912.20/x
  3. Step 3: Cross multiply
    267,390.60x = 401,085.90 × 172,912.20
  4. Step 4: Simplify right side
    267,390.60x = 69,352,645,357.98
  5. Step 5: Solve for x
    x = 69,352,645,357.98/267,390.60
  6. Step 6: Final answer
    x = 259,368.30

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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.