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Finding the Fourth Proportional to 547,858.50, 756,030.65 and 306,143.06

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Solution

The fourth proportional to 547,858.50, 756,030.65 and 306,143.06 is: 422,469.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,858.50 : 756,030.65 = 306,143.06 : x
  2. Step 2: Convert to fraction form
    547,858.50/756,030.65 = 306,143.06/x
  3. Step 3: Cross multiply
    547,858.50x = 756,030.65 × 306,143.06
  4. Step 4: Simplify right side
    547,858.50x = 231,453,531,333.92
  5. Step 5: Solve for x
    x = 231,453,531,333.92/547,858.50
  6. Step 6: Final answer
    x = 422,469.55

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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.