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Finding the Fourth Proportional to 547,400.15, 755,410.72 and 305,680.76

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Solution

The fourth proportional to 547,400.15, 755,410.72 and 305,680.76 is: 421,838.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,400.15 : 755,410.72 = 305,680.76 : x
  2. Step 2: Convert to fraction form
    547,400.15/755,410.72 = 305,680.76/x
  3. Step 3: Cross multiply
    547,400.15x = 755,410.72 × 305,680.76
  4. Step 4: Simplify right side
    547,400.15x = 230,914,523,001.75
  5. Step 5: Solve for x
    x = 230,914,523,001.75/547,400.15
  6. Step 6: Final answer
    x = 421,838.62

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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.