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Finding the Fourth Proportional to 315,994.16, 436,073.49 and 172,754.21

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Solution

The fourth proportional to 315,994.16, 436,073.49 and 172,754.21 is: 238,401.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,994.16 : 436,073.49 = 172,754.21 : x
  2. Step 2: Convert to fraction form
    315,994.16/436,073.49 = 172,754.21/x
  3. Step 3: Cross multiply
    315,994.16x = 436,073.49 × 172,754.21
  4. Step 4: Simplify right side
    315,994.16x = 75,333,530,403.12
  5. Step 5: Solve for x
    x = 75,333,530,403.12/315,994.16
  6. Step 6: Final answer
    x = 238,401.65

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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.