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Finding the Fourth Proportional to 547,385.34, 755,395.47 and 305,670.81

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Solution

The fourth proportional to 547,385.34, 755,395.47 and 305,670.81 is: 421,827.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,385.34 : 755,395.47 = 305,670.81 : x
  2. Step 2: Convert to fraction form
    547,385.34/755,395.47 = 305,670.81/x
  3. Step 3: Cross multiply
    547,385.34x = 755,395.47 × 305,670.81
  4. Step 4: Simplify right side
    547,385.34x = 230,902,345,185.23
  5. Step 5: Solve for x
    x = 230,902,345,185.23/547,385.34
  6. Step 6: Final answer
    x = 421,827.78

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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.