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Finding the Fourth Proportional to 547,399.15, 755,409.34 and 305,679.76

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Solution

The fourth proportional to 547,399.15, 755,409.34 and 305,679.76 is: 421,837.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,399.15 : 755,409.34 = 305,679.76 : x
  2. Step 2: Convert to fraction form
    547,399.15/755,409.34 = 305,679.76/x
  3. Step 3: Cross multiply
    547,399.15x = 755,409.34 × 305,679.76
  4. Step 4: Simplify right side
    547,399.15x = 230,913,345,752.96
  5. Step 5: Solve for x
    x = 230,913,345,752.96/547,399.15
  6. Step 6: Final answer
    x = 421,837.24

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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.