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Finding the Fourth Proportional to 345,401.30, 518,171.80 and 145,722.12

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Solution

The fourth proportional to 345,401.30, 518,171.80 and 145,722.12 is: 218,612.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,401.30 : 518,171.80 = 145,722.12 : x
  2. Step 2: Convert to fraction form
    345,401.30/518,171.80 = 145,722.12/x
  3. Step 3: Cross multiply
    345,401.30x = 518,171.80 × 145,722.12
  4. Step 4: Simplify right side
    345,401.30x = 75,509,093,220.22
  5. Step 5: Solve for x
    x = 75,509,093,220.22/345,401.30
  6. Step 6: Final answer
    x = 218,612.65

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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.