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Finding the Fourth Proportional to 547,111.55, 755,011.89 and 305,392.01

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Solution

The fourth proportional to 547,111.55, 755,011.89 and 305,392.01 is: 421,439.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,111.55 : 755,011.89 = 305,392.01 : x
  2. Step 2: Convert to fraction form
    547,111.55/755,011.89 = 305,392.01/x
  3. Step 3: Cross multiply
    547,111.55x = 755,011.89 × 305,392.01
  4. Step 4: Simplify right side
    547,111.55x = 230,574,598,661.00
  5. Step 5: Solve for x
    x = 230,574,598,661.00/547,111.55
  6. Step 6: Final answer
    x = 421,439.83

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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.