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Finding the Fourth Proportional to 279,391.16, 385,568.12 and 172,023.12

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Solution

The fourth proportional to 279,391.16, 385,568.12 and 172,023.12 is: 237,397.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,391.16 : 385,568.12 = 172,023.12 : x
  2. Step 2: Convert to fraction form
    279,391.16/385,568.12 = 172,023.12/x
  3. Step 3: Cross multiply
    279,391.16x = 385,568.12 × 172,023.12
  4. Step 4: Simplify right side
    279,391.16x = 66,326,630,114.82
  5. Step 5: Solve for x
    x = 66,326,630,114.82/279,391.16
  6. Step 6: Final answer
    x = 237,397.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.