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Finding the Fourth Proportional to 315,994.16, 436,073.48 and 172,754.20

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Solution

The fourth proportional to 315,994.16, 436,073.48 and 172,754.20 is: 238,401.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,994.16 : 436,073.48 = 172,754.20 : x
  2. Step 2: Convert to fraction form
    315,994.16/436,073.48 = 172,754.20/x
  3. Step 3: Cross multiply
    315,994.16x = 436,073.48 × 172,754.20
  4. Step 4: Simplify right side
    315,994.16x = 75,333,525,178.62
  5. Step 5: Solve for x
    x = 75,333,525,178.62/315,994.16
  6. Step 6: Final answer
    x = 238,401.64

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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.